Pac: Not clicking on an EXE file has nothing to do with trusting Morocco. Many viruses are hidden in the EXE, and the person doesn't even know it. There are hidden payloads that unleash silent programs that run on your PC. I'm not talking about the kind of annoying popup-loaded garbage, but I'm talking about keyboard loggers, bandwidth stealers, etc. (I'm not saying that Morocco necessarily has these thing in his EXE, but that's what COULD be there.)
I would not click on EXE files sent by family members, let alone someone I don't know personally. Again, it has nothing to do with my trust in them as a person. It has to do with the way that viruses are spread. Never, never, never click on exe files, unless you are 1000% sure.
Stalyn: Unfortunately, those programs are not a catch-all for viruses. In fact, they really only catch the annoying ones, not necessarily the really bad, sneaky ones. You can ask Pac, he had viruses that it took several different programs to track down, and to be honest, a PC in that bad shape is never totally free of that crap.
Don't be too comfortable with your mouse-clicks just because you run anti-virus, firewall, and anti-spam software. Believe me, I found out the hard way.