If you didn't know already, there are a lot of tour groups at WDW right now and I made it a point to stop line cutting. I was in line for Everest on Thursday and a group of 2 girls and 2 boys were going up to meet their friends who were in the tea farm area of the queu. Well, I politely told them that they had to wait in line like everyone else. Again, they told me they wanted to meet their friends who were "up there." I told them again, and the second time other guests in line began to notice. Again, they pointed to their friends. I told them they could wait behind me, but if they wanted to ride with their friends they could have their friends come back in the line and queu up with them.
By now, everyone in line was on my side and the 4 were not going anywhere. Score one for the non tour groups!!!!
Personally, I don't see why WDW can not post a sign at the beginning of each queu saying something like..."Enter the quee with your entire party. If your entire party does not enter the queu together, you will not ride the attraction together. Line jumping is not permitted."