I don't think most people would support it -
Many don't know how bad it is
The ones who use it like it
It would be shouted down as a threat to "free speech" by men
Some porn is illegal - or used to be
When children are involved (images of child sexual abuse)
When death is involved
When actual crime is committed eg I don't think you're allowed to show an actual rape
although most men watching this will tell themselves they're acting, if it even bothers them at all. Example of this was when one of the main internet sites announced they were taking down films with unconcious women and expected loads of kudos (and got it!!!). Some women may have been pretending but (having seen the front page with all the vid stills for adverts) most are women in what looks like normal homes out cold on the sofa. People can upload videos themselves, it's not all "proper" films so... This shows just how low the bar is in the industry that they wanted kudos and got kudos for removing what were pretty obviously homemade rape videos.
On the internet of course it's a free for all I'm not sure it's possible to ban anything.
UK was makign moved to make porn here minimum 18 and you have to prove it / somehow so not sure how or if that is going to happen.
The wider point about so many men enjoying seeing women abused, this is about misogyny and not seeing women as people really. Lots of men only seem really capable of caring about "their" women and the rest are either irrelevant, annoying, eye candy or for fucking.