Quote Originally Posted by Dr Unne from the other thread
It's also a rule, and the rules here are arbitrary based upon how we want to run the place. If we decided all sigs can only be green, then sigs that aren't green would be removed. Come to think of it... nah.
And also from the Signature Limits:

Any signatures not following these or any signatures with questionable or problematic content will be removed/edited by staff, and you may have your signature editing privileges temporarily disabled if this happens several times.

It was problematic and questionable so it was removed. End of story.