1.) Assuming VAC detects and bans you, yes.
2.) Yes and no. If the window title is in the VAC list of blacklisted processes, yes. If it's a custom app, no.
" 1. does cause a ban then is there any possible way to reverse engineer addresses in online lobbies(in which you are not host) without getting banned using CE (or some other debugger)"
Use static analysis versus dynamic. Read the assembly directly dumped from memory.