BTCC is excellent, but it is not F1 and, really, should not be compared to it. If the F1 drivers weren't in open wheelers and could follow as close as the BTCC boys they'd have just as many bumps, offs etc. Why? Because noone out there gives a toss about the guy who came second (RE:MS v Damon Hill, MS v JV, MS @ Monaco, Alain Prost v Senna) The best (most successful/popular whatever) drivers of the last 2 decades in F1 have all been known to 'knock doors' with thier opponents to get an advantage. Im not condoneing it but I do think that when I race online that, sometimes, people don't risk enough in an overtake due to politeness. In real racing the nice guy finishes last (RE: DC, Gilles Villneuve, Stirling Moss - many others, unless your ONLY objective is to win then you won't)
Comparing BTCC to and single seater open wheel stuff is pointless, it requires a different mentality. Who remembers when Mansell had a shot? He was blindingly quick and hugely couragous just like we remembered but he couldn't hack it due to the amount of contact involved. Can't say I blame him but it does make for decent entertainment if not racing.
And I'd far sooner see GP2 and motoGP get F1 style coverage than BTCC or other tin tops.