radio shack has sucked as long as i can remember... but you should have a lock...
but i understand your point... one time i was on the way home from work and didn't have a lock...i needed some dracula teeth for a costume party ... i rolled my bike in and asked if i could leave it by the door... the manager said no bikes and some worker watching the door was like "hey its a really expensive bike and it looks cool... i;ll watch it!" i got my $2 teeth and left