Too Damn many!!! panicked peds in cars tend to jump curbs & plow way too often in SA. And that god cursed motorcycle cop, has perfect aim & 360' aim, even at full speed. I've learned to hate those.
I've also gotten sick of peds making left turns into oncoming traffic (Especially when it's ME!). I keep the purple 2-headed monster (in the shower, LSPD HQ) just for those guys, if I catch 'em, it's up unto the roof & I beat the car until they get out or the car catches on fire.
Seeing those things fixed in GTA IV would make me happy. If they don't, at least leave the purple 2-headed monster where it can be found.