Just to add.
Please do not confuse the word biker with all people who ride "bikes" (Motor) especially vehicles ridden by true bikers, those who people often label wrongly, along with rock, metal, biker, hell, angel etc. They actually, mostly, will have more respect for people than those "bikers" targeting this area (and others) those who rob phones etc.
Many of the disrespectful kind ride their mopeds (or those they have stolen) or other vehicles, and mug people for their possessions, with covered faces.
Proper, old, bikers would not do the things many of these law breakers do.

Just putting "the biker thing" into perspective - ie NOT all bikers are law breakers, but peoples old views on bikers, maybe, should change as there is a NEW kind of biker who DO break the law, and often.

Regards
Sue