One thing that I always found odd about OpenStreetMap is how little moderation there is in comparison to, for example, Wikipedia.
On Wikipedia, important pages and articles or those with a history of vandalism, are blocked from being edited by unauthorised users, either temporarily or undefinedly.
But on OpenStreetMap, every new account can edit whatever they please, and their edits will appear on the map right-away; this benefits ill-intended users because they can alter the map for as long as they can until a mod or someone else notices their edits and reverts them or blocks them or whatever.
And, as very well @aTarom pointed out, if someone is very persistent and has a lot of spare time on their hands, they can create sock-puppet accounts and continue vandalising, creating an endless cycle of bad map edits that the mods will have to work to revert them afterwards.
It would be nice if OpenStreetMap implemented a similar system to Wikipedia, where zones with active vandalism will have temporal editing restrictions, where unauthorised users shouldn’t be able to submit edits (or a mod would have to review and approve them before they appear public).cut down
An alternative method would be to apply editing restrictions only to certain tags in certain zones or territories, for example make boundaries only editable by mods and authorised users (to prevent back-and-forth edits in disputed territories borders) among other uses (like for example, reduce the linguistic vandalism in the aragonese region of La Franja).