Add the ability to limit changeset size by tomhughes · Pull Request #4908 · openstreetmap/openstreetmap-website · GitHub got merged! It is one of steps toward new user being blocked from globe spanning edit.
Now we will get questions “why I cannot add name of USA in my language? Edits gets rejected as it has too large bounding box, whatever it is”. But sadly we will need to accept this tradeoff given increase in vandal activity within recent months.
Note: it will limit this specific type of vandalism. It will not eliminate fully possibility to vandalise OSM and new tools/protection methods etc are welcome. Especially in form of working code where design was discussed with relevant parties.
Thanks to everyone who worked on countering various vandals, in various ways.
EDIT: as pointed out in Maybe rate limit changeset size? · Issue #4805 · openstreetmap/openstreetmap-website · GitHub this is initial step, not full deployment