As Sam said, here in Toronto the community is fairly close knit and if there are messengers stealing bikes and parts you can bet they are NOT part of this community of good people. I will also say that you are more likely to get your stolen bike recovered by a messenger than stolen by one. Got your bike stolen? Want to get it back? Let the messenger's know about it....a description of the bike and most will be thrilled when they see the s#!tstain that is riding it and even more thrilled when they return it to the grateful owner. Speaking purely from experience.