Search for "vandalism" on this forum for some hints. See for example [this][1]. There is no sabotage protection present, but a lot of people do keep an eye on the map using numerous tools. And you can revert changes using a JOSM plugin, and get help here or by contacting the Data Working Group (DWG). In practice, vandalism isn't very common, though it does sometimes take very long to be detected. [1]: https://help.openstreetmap.org/questions/216/what-should-i-do-about-vandalism

Search for "vandalism" on this forum for some hints. See for example [this][1]. There is no sabotage protection present, but a lot of people do keep an eye on the map using numerous tools. And you can revert changes using a JOSM plugin, and get help here or by contacting the Data Working Group (DWG). [1]: https://help.openstreetmap.org/questions/216/what-should-i-do-about-vandalism