Yes, that's where 90%+ of the problems occur (no offence to the hundreds of honest members with zero trader ratings).
It's very rare that you'll run into trouble with a member with 5+ iTrader, much like it is dealing with eBay powersellers. It happens, but if you're careful about who you deal with, it happens much less often. Moneybookers is a must imho for people with zero feedback.
