I don't even get mad when people run ahead, I totally understand why they do it. Seriously think about it. Why spend 15-20 minutes on one strike killing useless enemies for Green Engrams with very little chance of getting any blues to drop, when you can complete a strike in less than 7 minutes by skipping straight to the the Boss and collecting your crappy Blue Engram rewards. Time is of the essence, especially in this game that takes up much of your time doing the same crap over and over. You can go through 2 strikes and get double the rewards in 10-12 minutes by skipping useless enemies. Also doing strikes has become so repetitive that most people just want to get it over with as fast as possible to collect the loot and move on to something else. There is nothing wrong with speed running through strikes, but try to do with with friends who want to speed run through it.