removal of code red (Score 1)

Ok, here's the beef. A friend and I are having this debate. We both have linux machines which are logging all these attempts to infect our machine from neighboring machines (who's owner's weren't savvy or smart enough to avoid infection, or were just a day late) Is it unethical to offer removal services to these poor saps for a fee? I say no, its not. His argument is, they might thing you're the one that infected their machine in the first place. While his argument might have a valid point (somewhere), if I am offering legitimate services, and can prove that my machine is being attacked by their machines, what is wrong with getting paid to help these people clean their machines? Someone explain this to me. Regards, Mark