1) So when they do RBT, catch someone who is over the limit, who could potentially kill other innocent people... that' useless? Or catch a speeding driver who could also, potentially kill innocent people? I can understand you don't like them because they hide in spots and sometimes do things you probably consider dog, however they do, do some very good things.
2) He shouldn't have to 'avoid' the drop kick driver as he's keeping a safe distance right? I don't think that's what happened anyway, I think the driver appeared to pull slightly to the left, the OP thought it was OK to pass, then got ran into.
3) If you break a road law you're not a criminal, nowhere does it state this. Most road laws that you break can be deal with via a ticket, however yes, some matters you can be charged for and you will be a 'criminal'. eg: drink driving. ( I answered this question in quite the literal sense I know, however I just thought I'd say it anyway).
To the OP: I can only go off what you told me, which to be honest I don't think is the whole story. However if what you're saying is true, I suggest you be a little more patient with obvious dopey drivers. If I saw someone driving like an idiot the last thing I would want to do is over-take them when I'm unsure if they're pulling over or not. You're partially at fault there common sense wise anyway. You said it yourself, you observed them driving without indicating, etc.
Lesson learnt, keep clear of dopey drivers.