Is it possible that this "no insults" rule was put in place to try help keep cyber bullying down? Even if it was, it's been said over and over that RIU is for 18+ adults, not middle school kids that actually hurt each other by their bullying, we (well some of us) are adults and are able to get past this "bullying" but bashing a troll shouldnt be considered bullying or anything, it's a troll, they obviously don't have feelings.
That being said, if people are too sensitive on an online forum then let your balls drop and move on from RIU.
Take it this way, if someone came into your circle and fucked up the rotation or was disrespecting the vibe of the circle, they would get bashed and insulted, right? This is a stoner forum, Toke N Talk is probably the closest thing to an "online smoke circle" and why should the ones messing up rotation and the vibe be rewarded and the ones that supply the dank are kicked out of the circle?