basically if someone stole my bike that had shorts i just wouldn't let go of it, but if they had trousers, i would because then 10 yards down the road they will get caught in freewheel. That gives the perfect chance to beat the shit out of them.  :D  little bit of  humour  (Y)  
 
Hope you get you bike back man. 
 
Cheers 
 
Rich