Pnina is right if the banner does indeed violate the TOS which I honestly don't know nor care about. Violence in 3D can be seen as real violence, pixels or movies, I agree to this. But to be honest I also see this as a clown, and I know the Joker is not real. We are adults, or we should be.
I also think that this worldwide community is made out of artists who are from all over the world, have different beliefs, be it religious or way of life, and this should be accepted right from the start ( when you join Rendo), I think we are artists, and as such, we can tolerate a lot more things that average Joe ( which I don't mean as an insult, btw) Broad minds everyone!