Just now I hunted down a player in a public lobby and yeah...
I went off the radar and approached him from behind. I shot him about 10 times in the head with an auto shotgun and he did not receive any damage. He kills me.
Then I fire a rocket launcher at him twice. I hit him directly. Nothing.
I then notice that he's driving a blue unmarked police cruiser. I later tried hijacking it and I could only go in the passenger seat meaning it was his personal vehicle. I planted a sticky bomb onto it and as soon as he started driving it, I blow it up and it doesn't kill him. I got the bad sport message but didn't have to pay any insurance. He then went to LSC and get this, came out with a new unmarked police cruiser...
His PS3 name was xX_1337_SWAG_Xx (You can probably guess why I decided to go after him...)
It saddens me that the most idiotic of players can do this. (Having a name like that clearly shows you never had any education)
Anyway. Just wanted to share this.