I've got a couple, mainly people who I see posting the same sort of stuff around the forums over and over.
My ignore list shows "zero" count. Going from the above posts, it seems that most of the people don't ignore others and this can be safely concluded dp is full of good members except for that few scammers (who will be ultimately banned later)
aaron_nimocks, buffalo, Crazy_Rob, DaveN, GuyFromChicago, Jenstar, jhmattern, Katy, MaryMary, mcfox, Roman, rubeina, sarahk, Shoemoney, Smyrl, tbarr60, ViciousSummer and Shawn.
I am new in DP. I will never ignore my seniors and my teachers. But in my YM, I ignore about 120 names.