|Quoting AirCop (Reply 199):|
I'm concerned that someone hacked into the site and released a virus.
You are incorrect. A number of banned members of the forum were using a back door to edit their profile's signature line while they were banned. This ability is usually unavailable to banned users.
Apparently though, in the process, the DM programmers were a little overzealous in their reaction to close this loop hole. "Nice try, hacker" is the result, although erroneously shown to member accounts currently in good standing.
There is a thread about this on the parody site.