> I've seen the same thing happen on OpenStreetMap. You make an edit, and some old-timer comes in and just reverts it. I even once got an angry message there where someone "claimed" an area in a city for himself.

I'm sorry this happened to you. Usually, edits are only reverted if the are 'bad', e.g. the one edit I reverted this morning, where a user added some buildings in India and some buildings in the ocean close to Greenland; https://www.openstreetmap.org/changeset/136040657

If you've copied data from another map into OpenStreetMap this might also be a cause for a revert, otherwise `some old-timer` should absolutely not revert your edit. Do you care to link us to the edit that was reverted and to the user that sent you an angry message, because such things should not happen in our community! (If desired, you can also message me thought the internal OSM messaging system, same username).