My issues with using LFG for endgame content is that when using the description for a listing and putting important information for the player joining a LFG post. (i.e. kwtd, be certain light level, fresh runs, speed runs, collectable runs, or teaching runs) Some players will disregard to read the description. I recently tried to run teaching raids in Vault of Glass with a clan buddy, and it was really frustrating trying to find players and then asking if they've completed it before and lie about it. Or players joining a kwtd listings and lie about it. It is really frustrating because I do find players that don't communicate purposely, or just flat out be toxic about not "one phasing a certain checkpoint" then leave. It would be really great if Bungie would implement a raid penalty to players that leave in mid raids for being toxic while not hurting those that get disconnected.