Smn Burn Problems....

Ok, so I have my party together and we get ready to go to Korroloka tunnel. There is another party there so after the lead spoke with their lead for a bit, we go to an alternate location instead. After a while we head back to Korroloka since the alternate site didn't work so well. When we get there, the lead says "20 more minutes then it's all your." At least 45 minutes later, they finally disband, but members of their LS stick around. Level 75's naturally. So we get the mobs all together, get a good pull, and this member of the other shell just as soon as they see we've got the mobs almost dead, decides to cast an AoE spell on the mobs to prevent us from getting exp. Immediately after doing this, they log off. The shell that I'm speaking of is SnD. The player that cast on the mobs was Bonkerskitty, although another character named Toaster (same LS) was there earlier, then reappeared after Bonkers logged off, and immediately after logging in changed LS's. So my question is this: how many other parties are they doing this to? I know they've done this to at least one other group, and if it's as bad as I think, they're trying to monopolize the zone and disallow others from exp'ing in Korroloka Tunnel. Just a heads up for anyone that thinks about trying a summoner burn there.... if SnD is around, they're up to no good.