I hear you guys, you're all right, if you ask my opinion.
In fact, just as
Grump642 was mentioning about it, yesterday evening, just one day after the incident, when I was circling around my street to find a parking space, two guys with cellphones (while speaking on their phone) walked into the street and cut my way and wanted me to stop, making the kind of pull-over signs? Guess what? Of course I drove away. There was no signs around that would seem to require some help for any kind of emergency... Was it a car-hijacking attempt?? Who knows. I had no intention to test anyway.
Guys, I had put my life in real danger in life, many times, shot at with real bullets, stalked by real trouble people (like sec. serv.) in various dictatorial countries, but they all were worth it in a way. For a car stereo or something so feeble, having trouble is not worth it.
For God's sake, I'm living in Central London, supposedly the safest possible place in the whole UK? How about the rest of the city and the country?
Having democratic rights and safeguarding them and continuation of those are the foundations of our civilized society, but... there is a but... because those rights should not be allowed to be abused by some in order to terrorize the rest of the good people in the society.
I mean there should be a balance; the attitude of "do whatever you do, as long as you do not try to upset my money wagon, so I can eat tax-payers money as big bonuses" lead things to this level. --I can make a quick reference here to
audioave10's above note as well.
There should be some sensible application of "authority" in the societies.
Well, I'm just writing these in an informal chat of course, not very formulated thoughts of course, but I'm thinking more or less within these lines now.

------
Also thanks for the inputs,
MeanderingBeing and
DARK TEMPLAR 