From my time in PD so far. I have noticed two things that I dislike. Mostly every night, something such as a simple pursuit on a speeding vehicle turns into a full blown ambush.
The reasons I dislike this sort of thing is due to the fact that its simply to PVP. There is no IC reason to ambush. You would have received a speeding ticket but instead its turned into a full blown fight, because people are bored.
I love a fight every now and then, gets the excitement up. I simply want it to be for a reason. Baiting pursuits just to setup and kill cops is not healthy RP.
Now with this information I don't necessarily blame those who do this. I know why, and its due to the crim side being so stagnant that the only thing to do sometimes is fight cops to do anything, I've been in the same boat in the past, and I've since not played crim for a month or so plainly due to it being so boring.
Labs have been the main thing crims do and even that isn't fun. Sitting in labs just for the hope someone pushes you for something to do. The server has been far too dependant on labs. The majority of people have tons of money, cars, guns, that there is simply nothing else to do but fight, and this needs to change. People need stuff to do, regular, in depth updates for the server.
I also agree on the subjects @Carl Vespucci made. All of these things need changing.
Overall, give crims more to do.