On the subject of PDs, I've gotten "the number" twice. The first time was no big deal, kinda BS, the second time was pretty serious, but I was basically in an emergency situation. Both times i was told no big deal, dont worry about it. Even being told that, I still considered sending a nasa form for the second incident, mainly because it involved another aircraft, and he was clearly pissed over the radio, and i didnt know how far he was going to take it.
On the flip side, I know guys who have gotten a PD because of busting altitude by 500 ft. They didn't cause a loss of separation, they were just a dick about it.
I think the point of all that is, there is (was) some humanity involved in it. At least we all have a chance to save or hang ourselves.