Hi i am community moderator at Polkadot, Polkadot+ and Kusama discord servers. My fellow community moderator has made a cross chain bann bot ,which means that, if an account is banned on one of the 4 servers (Acala discord server as well), the account is als banned on the other servers. Additionally he has added a function that a ban can also be applied to accounts no longer online. I have gone through the testing of the bot with him and he put a lot of time into coding and getting this bot running properly. 
The safety of our community has benefitted a lot from his input, and it also reduced the work we have as moderators to keep our servers clean.

For your information: I sometimes have to ban 25 accounts a day, and now because of this awesome bot, i dont have to do it x3 on the other servers, because it automatically gets done for me there.

Scammers tend to roam about all servers to do their nasty tricks

amazing ban bot for the benefit of safety and security cross servers