That really doesn't happen here that I know of. I think perhaps the reason is that a lot of people in my area ride bikes to work, to the grocery store, to school, etc, very few of those bikes are modern, and a large fraction of them are C&V. This is unlike much of the US where bikes are just playthings to most people. Also, we have a lot of bike stores here for just this reason so nobody is going to turn customers away...they know that person will just go to the competition.