Amen to what Ambient said. The "passive" vibe is certainly visible -- and with five minutes at the mall I could show you the women most likely to be victimized. If you don't make eye contact or are otherwise ignoring the "groper," then you're just an object. We've talked about objectification a million times before, but that's exactly what creeper is looking for.
As soon as you look at him or say "hi," he's forced to realize that you're no longer an object for his sexual lust but a person with feelings. Even the creepiest of creepy will shy away from this, because they-themselves have been on the recieving end of many unfortunate jabs. If you're able to forget its a person on the other end, it's very easy to do all sorts of creepy and evil things. I'm certainly not saying that a comic book store or any-other-place for that matter is a bad place to be, but remember to BE A PERSON. If you don't set yourself apart from the surroundings as a human and not an object, then you're going to look exactly like the porn that aforementioned creeper likely wanks off to daily.
I highly suggest you download/checkout/buy a movie called Dreamworlds II. I had to watch it for my "Sexuality" Philosophy class last year, and it addressed this very topic. It showed, quite blantantly, the messages that media like MTV sends. It shows hundreds and hundreds of MTV "music videos" where women are portrayed as always-willing and never-offended by a strong and domineering man. The narrator goes on-and-on about what a horribly distorted image of women this gives the viewer. MTV actually tried to get it banned, as "slander", but the court ruled in favor of the documentary. I had never really analyzed that my perception of women might have been a bit fuck'd until I saw the video, so it's very likely that Creeper has never known anything other than the way he treats women currently. The best way to teach him is to show him that there ARE assertive women who'll say "hi" and not let themselves be groped. The documentary is quite interesting, and I think it might help you get over your fear of the overtly-groping creepers.
