Perhaps the allowed signature styling should change with activity score / membergroup. Like:
- Newbie: No styling (including links) allowed. Max 40 characters.
- Jr. Member: Links allowed. Max 100 characters.
- Member: Unlimited length.
- Full: Color allowed.
- Sr. Member: Size allowed
- Hero: Background color allowed
This is done, except that Newbies can use 50 characters and Jr. Members can use 150 characters. The style limitations are applied immediately, but the size limitations only apply when a signature is updated. Tell me if there are problems.