BUR #11862 has been approved by @evazion.
deprecate loop
In more than 72% of the instances loop has been used it has been confused for looping_animation or an older related tag.
Also, most of the posts tagged loop share no similar aspects. On many of the posts I can't even tell why the tag was added.
Deprecate then garden seems like the best course of action.
I had to make a wiki to deprecate, so I just make a quick disambiguation page.
Updated