Bicycling while looking for caches is an unfair advantage over those walking or in wheelchairs and should be banned. And what happens when you're bicycling with a friend and you find the cache first - does the friend get to log the find too? Bicycling is a tool used by number hounds just to be able to get high numbers my grandfather and his walker could never do. Not to mention how unfair it is to ....
Oops, sorry. Got carried away there since I just read the E.T. caching thread full of people complaining because some other cachers are doing things they wouldn't do to increase their numbers.