Re: Unspoken rules?
Removing pedals for sure is not only totally lame for the obvious reason (not a BIKE anymore) - it signals a couple three things:
a) mechanical ineptitude
b) giving up
c) total disregard for your fellow motorized biker, who may break the law, but does not actually flaunt it and thereby screw up any hope of being legal with some minor law or bike tweaks
Other than that, pretty much anything goes. Sometimes even farting.