Most likely my translation is confusing you. My point was that as long as accounts are not blocked, it’s best not to engage in reverts. Clarified that.
Could we just simply put a strong CAPTCHA on the sign up page? Or at least introduce a several hour time delay between registering and when editing is enabled so we have time to spot suspicious accounts before they start the scripted edits?
If you see a problem on a rendered map, can you go to that place on https://www.openstreetmap.org/ and use the “query features” button at the bottom right to see if the problem still remains? Likely it has been fixed in the data and you’re just seeing a cached version of some old data (either in your browser, or from the tile CDN). If you do see vandalised data stll, please report the object ID that is the problem.