If you are not from Kil'jaeden and are saying "PVP on a PVP Server", then you know nothing of this situation. I have been Horde on Kil'jaeden for over 2 years and this guild Ruinous is notorious for lagging and griefing. I don't mind World PVP at all. What I do mind is taking 5 minutes to mount up in Orgrimmar due to insane lag and having the server crash over 5 times in a night (not what happened yesterday, just one of many other days). They spent hours, with over 200 people online, spamming and lagging the boat. They crashed the zone. They are not that naive, they know EXACTLY what they are doing. I'm surprised Blizzard hasn't acted in the past (like when crashing a big city like Org constantly).
Since I'm very very familiar with this situation, I am happy Blizzard chimed in. I would wish this kind of "world PVP" on no one. It is not fun for anyone except the griefers.