I don't patronize Walmart if I can help it, but I do kind of see the manager's point.

As a former store manager, I often had to make judgement calls. Maybe this particular store had a lot of 'ninja' cyclists coming in and wanting to bring their bikes (walmart type bikes) into the store with them? The store has to draw the line somewhere. The average person can't tell the difference between a $600 commuter bike (or mtb or whatever this cyclist was riding) and a walmart bike. Neither can their cashiers. Maybe they have a problem with people walking in and then wheeling their bikes out of the store saying "I rode this in...it's mine"? I've certainly seen theives as bold as that (and bolder). With gas prices the way they are...it's possible that it's become a problem for them.

Of course, the simple answer is for them to get with the times and get a bike rack.