<div dir="ltr"><pre style="color:rgb(0,0,0);word-wrap:break-word;white-space:pre-wrap">Hi all,
Last saturday, Central park in New York City was vandalized by a new OSM user `Meowthreetimes` in all the map edits:
- 46756622 introduced a fictional lake inside Central park <a href="https://www.openstreetmap.org/changeset/46756622">https://www.openstreetmap.org/changeset/46756622</a>
- 46756461 renamed Central park in <a href="https://www.openstreetmap.org/way/427818536/history">https://www.openstreetmap.org/way/427818536/history</a>
- 46756506 introduced a fictional lake near Fort worth Dallas <a href="http://www.openstreetmap.org/way/479837732/history">http://www.openstreetmap.org/way/479837732/history</a>
It took 2 days for the edits to be noticed and reverted on one of the most popular locations in the world.
This was possibly preventable with a more active mapping community, but a previous incident  highlights how simple cases like dragged ways can stay around the map for months under the eyes of local mappers. The current strategy of leaving changeset comments to users to prevent bad edits does not scale, especially if the mappers do not read messages like Maps.me editors , or if there are no expert mappers in the area who are knowledgeable in reporting and reverting changes.
Thinking out loud on how we could better improve the current process to act on bad edits:
- DWG currently acts promptly on incidents reported via email, but we need a more accessible mechanism that allows new users to report such incidents directly from the website or editors. The email details and existence of DWG, is only available currently in the wiki 
- Auto-blocking known vandals to prevent repeated attacks 
- An organised repository to report and learn from previous attacks. There seems to have been an effort to do this many years ago on the wiki 
- More visibility, awareness of QA tools and history tab on the OSM homepage. Most of the really powerful QA tools like osmhv and osmose are only known to advanced users.
It would be great to hear more approaches that could protect the map against common mistakes and intentional attacks. Much of the world lacks an active mapping community, so it is up to a small set of power mappers to catch and revert most of the bad edits . Building better support systems to respond to bad edits could help more experienced mappers focus on community building activities.
 <a href="https://www.openstreetmap.org/user/PlaneMad/diary/40491">https://www.openstreetmap.org/user/PlaneMad/diary/40491</a>
 <a href="https://github.com/mapsme/omim/issues/4188">https://github.com/mapsme/omim/issues/4188</a>
 <a href="https://wiki.openstreetmap.org/wiki/Vandalism">https://wiki.openstreetmap.org/wiki/Vandalism</a>
 <a href="https://en.wikipedia.org/wiki/Wikipedia:Autoblock">https://en.wikipedia.org/wiki/Wikipedia:Autoblock</a>
 <a href="http://wiki.openstreetmap.org/wiki/List_of_Vandalism_Changesets">http://wiki.openstreetmap.org/wiki/List_of_Vandalism_Changesets</a>
 <a href="http://osmcha.mapbox.com/?usernames=woodpeck_repair%2C+zool%2C+SomeoneElse_Revert%2C+mavl%2C+pnorman_mechanical%2C+_sev%2C+OSMF+Data+Working+Group%2C+Peda%2C+FTA_dwg%2C+Deanna+Earley%2C+Firefishy_repair%2C+drolbr%2C+emacsen_dwg%2C+sly&is_suspect=False&is_whitelisted=All&checked=False">http://osmcha.mapbox.com/?usernames=woodpeck_repair%2C+zool%2C+SomeoneElse_Revert%2C+mavl%2C+pnorman_mechanical%2C+_sev%2C+OSMF+Data+Working+Group%2C+Peda%2C+FTA_dwg%2C+Deanna+Earley%2C+Firefishy_repair%2C+drolbr%2C+emacsen_dwg%2C+sly&is_suspect=False&is_whitelisted=All&checked=False</a>
osm : manoharuss</pre></div>