Arriving late but here's my input on what shouldn't even be an issue.
A signature is offending users so you remove the signature and warn the user as per forum policy.
ISSUE RESOLVED, NO FURTHER ACTION, DONE. Unless you're a HxF GM in which case you completely overreact.
Nobody needed to be fired over this, and why flags are being banned I don't even know, really if people are offended by it then I suggest they go watch Fox or CNN and learn about how the Pope is the evilest man of 2015 as that seems more pressing. Maybe we should ban pictures of the pope as he's offensive to a large amount of Americans... that'll be the next offensive issue of this year!
Anyway, @
Wispur; have a bit of humility, revert the firing and revert this silly flag ban. If you're going to fire Dan over other things that he's done before, it may have been worth growing a pair and firing him before he upset a couple of people with a .png file. Or stick to your guns and convince yourself you were right, that'll be one person convinced at least.