not really, it's just that sometimes people can fly off the handle about minor things like a package being shipped a week late, or simple misunderstandings that can get blown way out of proportion. then there is this recent scamming thing going on with jeremy which has already generated alot of attention.
i myself have bought & sold LOTS of stuff on the various forums throughout the ~5 years i've been a part of the online W-body community and never once have been ripped off. at worst i've been dicked around with people wanting to buy stuff from me but that's pretty minor.
for the most part, i think 98% of transactions on the forums go smoothly so i didn't mean to scare anyone off

this is more or less a forum version of an ebay feedback rating system.