You don't think the outcome would be any different if you were to get rammed by a cop car on a bike vs. in a car? I guess it depends why they are chasing the bike. If they just held up a bank at gun point, killed someone, etc. and they fled on a bike, then by all means chase the idiot down and ram them. If it's just a minor traffic stop for speeding, running a light, or whatever and they are fleeing then the possible/probable outcome of death doesn't exactly fit the crime.