I've seen some gatekeeping in the OSM community as well. In this specific case, this is also (in my opinion) due to bad tooling. Basically the easiest way to keep an eye on an area is to use a tool that shows changesets whose bounding box includes a certain area. So you could make a single tiny edit in both NY and LA, the bbox would ping a huge swath of the US. This happens all the time, actually. It's annoying, but the way I see it that means we need a better way to see changesets that actually affect a specific area.