The worst levels I find are 75-90 F2P'ers and 60-70ish P2p'ers. I just find that they are very ignorant, often call others noobs because they are lower levels and are extremely immature and lame. I usually only talk to people around my level (88) as most lower levels will only engage in conversation if they need help, want money or for me to do skill cape emote and higher levels are usually AFK, often talk a lot in clan chats/IRC or plainly think that they are far superior then lower levels. This is my point of view from playing free to play for the last 6 months and I truly believe that most people will only talk to you/show respect if you are a high level or have a fancy item(s). I remember talking on several occasions to the 3rd ranked woodcutter at the time, and many higher ranked players of Runescape, with out a second thought about level differences. But a lot has changed now, and it's not just in game, even on Tip.It people aren't as nice as people were back a few years ago.