Be honest! Some respond and I noticed that others don't. When my sig was big and crappy I received a nice little message from Pastel. At least it was something important and pertaining to the forum. Those other pms were friendly and I remember one time when I received a whiny pm. Pm systems are certainly a way for me to keep in touch with another person of what's going on or what is to come. The last private message I received was from Meluvia about Reports. I haven't received a pm from Pastel since August 4 and he was on yesterday but I was banned yesterday so that doesn't count.
This thread is not meant to start flame wars because if there's flaming, it'll be reported and infracted.
Plenty of final warnings people!