So my group and I experienced some griefing from a player via the LFG tool. I reported them to the extent I could in game (“LFG System Abuse”) but would like to elaborate on that here as it seems that the player was exploiting a bug (oversight?) within the LFG tool or squads.
We were in a dungeon when we advertised on LFG. The player joined our party and next thing we were all immediately and unexpectedly kicked out of the dungeon. It turns out the player had somehow placed our party into a squad on LFG which explains why we were kicked out. After we had been ported outside we had to leave squad, regroup, and restart the dungeon again. The player would do this every time we listed.
Simply, I think it should not be possible to join a squad while you or any of your party members are in an instance for this reason.