Gokujin.
Actually there should be about three or four other names after Goku's, but that's the only one I can remember.
I (37WHM/18BLM) was taking an LS member and his pt from Dunes to Jeuno via La Theine and Jugner. They were lvl 18-19, and full so I couldn't join the pt. Needless to say, three of them ended up dead in Jugner from a combination attack of a tiger, thunder elemental, and goblin. They managed to kill the tiger and gob, at least, but the elemental killed three of them before one of them took it for a run. When it got back I finally had enough mp to deal with it. After I raised them, one of them DC'd, so I was finally able to join the pt and get them around safely. "Safely? Where's the fun in that?" was the reply.
Tele-holla'd them back to La Theine only to find out that they couldn't choco because they weren't 20. Should have realized that, but I and my LS friend were a bit too annoyed to realize that - we just wanted to get them the heck to Jeuno.
Anyway, we're going back through Jugner with me in the pt so they're all invisible and things are peachy. Then invisible drops, and they get aggro'd by a orc. They kill that, but then Gokujin gets the brilliant idea to attack a tiger, which was EP to me and probably IT++ to them. I don't remember why, but I couldn't heal Goku before the tiger killed him. I raised him, and then another elemental showed up. I told the pt to get back, which some did. Goku and a couple others, however, were all "COWARDS!" and ran up there.
Here's a thought. Three of us just got killed by an elemental, so let's all go get aggro'd by another.
*big giant headdesk*
They all ran off, and my LS friend and I disbanded and I tele-holla'd him back and he went to the Dunes to op warp.
I took him to the Dunes, warped back to Jeuno, and searched for Gokujin's name to see that he was still in Jugner, probably dead.
Thoughtlessness, recklessness, not paying attention to the PL's MP level (only 503mp, for cryin' out loud, I'm not a 75 I don't have unlimited MP), and general stupidity (Goku's a flippin' paladin, he's played long enough to know better) = blacklist in my book.