Because of the random frame stuttering caused by the season 4 patch I've been forced to play in PvAI modes to try and complete my orders, and the amount of AFK farmers is insane, there it at least 1 per session, and the report function isn't specific enough to report them. The report function needs to be more specific on what different things come under. for example does AFK farming count as cheating or griefing?
One of the most extreme afk farmer I saw was someone called "BOT..." and he was rep 253. Clearly the way you deal with these kinds of people isn't good enough because if he is able to get to that rep without being caught, something is clearly wrong.