I know, cameras, but there shouldn't be that many, there should only be cameras in banks, police stations etc...
If that's only where they are, then there's something wrong with them, because its annoying that when you're an assassin, you can't assassinate.
I think this problem could be fixed by showing something in the GUI that tells you if your crime could be witnessed by a camera,like a radar or an alarm, although I think it might be difficult, it would enhance the Assassin job experience!