Thankfully, the latest patch makes it so that the Humania bosses don't spawn until the mobs are mostly dead, so you can't run straight to the boss anymore. Lots of times, I'd be halfway through a map in a PUG, and if there was an open spot, a Thrasher player would jump in and just run straight to the boss and kill him. It would usually happen in one of those public games with no host (in other words, un-bootable). We're taking the time to grind and put the work in, and some guy waltzes in and steals the drop, making the whole run useless. That used to really grind my gears.