Banksy

[Stargazer]

How come he is never spotted while carrying out his elaborate artwork?

[Clone]

Elaborate?

[bednobs]

coz no-one knows where he is going to do it, and he does it in the small hours, clearly uses a template soit would be reasonably quick?

[Canary42]

How do you know he isn't ?

Bold assumption IMHO.

[Iamtheoneandonly]

I've often wondered that myself, with all the CCTV everywhere he must be on camera. 

[douglas9401]

But it's Banksy, he gets a pass.