It's the same here in the US. All you need is to "look su ious" and have brown skin and you could be in a load of trouble before you know it.
If you haven't done anything wrong why would you "look su ious"?
If 80% of the crime is committed by a certain race they
darn better be more su ious of that race (and that doesn't translate into harrasment). I don't want my tax supported police force following people based on a quota, that's nuts! I have no problem with profiling, that's good police work. In the days of the Calif. gold rush I'm betting the miners mined in the areas where they were relatively certain there was gold. Police dogs are trained to follow a distinct scent otherwise they would be useless, that in essence is what the police are doing.
And believe me, the police will respond quicker to reports of a "su ious hispanic, black, asian, arab or muslim man" qucker than reports of a su ious caucasian male.