Allow community maintainers to subscribe to other communities' ban lists.
Short, concise description of the idea
Give the community maintainers the ability to share their ban lists with other communities' moderators.
Full description of the idea
Livejournal suffers from hordes of bots that post scam into multiple communities. The text and links may vary, so it's inefficient to filter the posts automatically. However, a human moderator can always tell a bot from another human and ban the former.
I suggest to add a feature that allows a maintainer of one community to subscribe to other communities' ban lists. That is, if someone bans a bot from his community A then it will automatically be banned from other communities subscribed to A's ban list.
Note that this is not the same as the "Report a bot" feature. At the present time if a bot bombs several communities a ton of users reports this fact, but the scam postings won't disappear until the malicious account is considered a bot and blocked. On the other hand, if one of these users is a community moderator that bans the bot, the postings should automatically disapper from all the communities that are subscribed to his banlist.
- The amount of spam will reduce drastically, as people usually trust the maintainers of large communities and will adopt their banlists.
- Such an approach may cause propagation of human user bans across several communities. This is hard to avoid, but shouldn't be a common problem.