[Spooky]

Yes they should be dealt with the same way a discord server is dealt with. Only authorized/upgraded members should be allowed to post the link. New users will come through here not aware of scammers and a server/channel is the best place for that shit. Best bet is to do an account by account evaluation for each one. Or we could have users authorize their discord/telegram via Sinister API.

I don't see much reason why "authorized/upgraded members should be allowed". As I was saying a Telegram channel in their signature is already very common, we don't need posts about it...
Although maybe they're thinking about forbid Telegram link in signatures also ?

Because a user who is allowed to post their invite link should be allowed to do so. The signature should not be the only allowed place for that.