Most of the anti-walmart posts are speaking to the piss-poor setup of their bikes.
Just recently there was a thread about a guy's wife who was riding her wally world bike down a hill and lost all brakes and crashed and hurt herself pretty bad.
Stupid, huh? Not when my life is at stake.
What's bad is that the cheap prices attract newbs. But it's the newbs that don't have the foresight or mechanical skills necessary to make these bikes road worthy.