Xmas: prefix is just as ridiculous as if you would put "road:" prefix in front of every single tag of every street. Or put "building:" prefix in front of every single tag on houses. This is just not how it's supposed to be mapped in OSM.
Somebody invented this Xmas: prefix 10+ years ago without putting much thought into it and it is most definitely not how people map in OSM now. Continuing to use it only does disservice to the OSM data integrity.

What benefit does it give to put these features behind this namespace?! Any data consumer that doesn't know to support this prefix will simply ignore it and not use it. This prefix actually hides the data and makes it less discoverable.
The fact that you created an overpass query or a map specifically to display these Xmas: objects only further confirms that this is nothing but osm.wiki/Tagging_for_the_renderer

What's the point of having "xmas:feature:shop=christmas_tree" instead of just "shop=christmas_tree"? And the same with all the other tags. They should be standardized and be in schema with rest of OSM tags.
With this kind of misguided prefix tagging we might as well have school: for everything education related. And have retail: prefix for everything related to stores.
It is ridiculous and unnecessary. It doesn't add anything to the map that can't be expressed using existing tagging styles.

I think making xmas: prefix on every single tag is redundant, unnecessary and even detrimental. This only complicates object parsing for data consumers to handle yet another edge case for a small number of another type of POIs.
opening_hours= tag can already accommodate seasonal POIs that operate only during certain hours.
Putting xmas: prefix in front of other tags makes them invisible to data consumers.

It might be so, but in reality it's not open to public. Ps370 is a school for kids with developmental difficulties and the school keeps things area under strict control. It's always locked up not to allow public access(even during the summer break) and during the school day when kids are there security guards stand by the exit/entrance to ensure that kids don't wonder off or someone unknown get in.

I live 2 blocks away from this school and whenever I walk by it's always chained up. The only time I see people there is during school gym class or after school football clubs. It's not open to public.

Hello.
Could you please elaborate why did you create this relation?
---

Published using OSMCha: https://osmcha.org/changesets/130806852

Hello.
Please note that this feature is going to be deleted since it's already mapped and goes against osm.wiki/One_feature,_one_OSM_element guideline.
---
#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/130804248

Hello.
The football field here is not part of the publicly accessible playground. It is used only by Grady HS.
---

Published using OSMCha: https://osmcha.org/changesets/130768231

Hello.
Please note that NE section with the running track and 2 basketball hoops is not part of century playground. There's no public access to that area. It is part of PS370.
---

Published using OSMCha: https://osmcha.org/changesets/130768021

Hello.
Why did you create way/1126339959 when way/170589186 already exist with the same tags?

Also unless it's proper name, and some very few other exceptions, all tag values should always be in lower case, and instead of space they should be separated with _. As such "American Football; Soccer" should be "american_football;soccer".
---

Published using OSMCha: https://osmcha.org/changesets/130760261

Hello.
Could you please elaborate why did you change every tag to have xmas prefix?
---

Published using OSMCha: https://osmcha.org/changesets/130751491

Hello.
way/244163829 address is "1000 U"? and way/244178743 address is "1000 T"? These are rather strange addresses. Where is that info coming from?
---

Published using OSMCha: https://osmcha.org/changesets/130738232

The accuracy of positioning crossover of the underground rail lines..

Hello.
What is US-NPS? Please see osm.wiki/Names#Abbreviation_(don't_do_it)
---

Published using OSMCha: https://osmcha.org/changesets/130734017

Hello.
As documented in osm.wiki/Names#Names_are_not_for_descriptions
name field must not be used as a description, which is exactly what you did in most of the edits here. Please correct these problems, else this edit is going to be reverted.
---
#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/130730771

Hello.
Could you please elaborate why did you change node/5391393231's bus stop name into a "location" tag?
---

Published using OSMCha: https://osmcha.org/changesets/130726582

This feature is going to be deleted because it's already mapped in node/9771053151.
---
#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/130721799

Once again, this feature is going to be deleted because it's already mapped as a way.
---

Published using OSMCha: https://osmcha.org/changesets/130721035

Hello.
Do you have more information about this cafe? Its address or phone number or website?
---

Published using OSMCha: https://osmcha.org/changesets/130699923

Hello.
What is this edit based on?
---

Published using OSMCha: https://osmcha.org/changesets/130670175