Leveling in Yhoator JungleFollow

I'm sorry but I need to vent. I was leveling my blm in yhoatar yesterday for about 8 hours. Through this time someone kept zoning gobs and took out many ppl while doing so. I am not sure exactly who did this, but I have my Suspicions. I am not one to point fingers cuz s^^t happens, but when the same person is constantly shouting for help and this person was at least a lvl 50+ pld, I know they can handle themselves in yhoatar and kill any gob that they wanted to at least near the zone. This wonderful person caused my party to be wiped out as well as many others. I truly don't understand why ppl feel the need to do this. I mean is it fun for them. I just really find this rude and selfish, not to mention just flat out wrong.