Well if the Greek store is already taking all those precautions (and good for them by the way), I would definitely bring it up to the Student Life director. I mean, if someone not a member is in letters and gets busted buying drugs, for example, you guys could be in mucho trouble.
The ebay pins and such do bother me, but I think the situation you're describing is worse in a way. Most of the pins & ritual stuff on ebay is bought by collectors - obviously a guy buying a sorority pin isn't pretending to be a member - and they're not going to wear it while doing inappropriate things. The situation you're describing could really cause problems for people.
p.s. You might want to try posting this in Greek Life too.
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