Only if they sell it, or charge people to go and look at it. I've heard they're going to cover it in perspex to keep it safe. That said, Banksy did say the kids could add to it if they wanted.

However if I did this I'd have been chased or it would've been scrubbed off.

Mind you I have never truly understood most modern art. I used to work at the tate gallery and saw tracey Emin's bed...and half a horse etc. I just thought they were the luckiest people alive. with millions of adoring moronic 'follow the next sheep's opinions' fans.

Then I'd walk into the traditional historical paintings room displays... and saw canaletto's and so on, and undrstood this was pure talent. Something I'd never ever be able to copy or do myself. Pure talent. Being able to draw what we'd think as simple; like a glass bottle...do you know how hard that must be? and im not talking and black pencil outline or a light blue vase...

now I see most of this modern stuff and I think with time and interest I could emulate some of that.

Most. Not all.