this is what i would do, i would make sure i havent ridden the bike to make sure that the engine is stone cold.
dont have the key (if there is one) in the ignition.
dont be wearing my helmet or gloves or anything like that.
then they should be fine about it. but dont take my word for it because they probably can fine you for it if they are in a bad mood, thats just the way i would do it though.