There is a semi-strategic rationale behind this kind of greifing. If you are griefing the opposite faction to the extent that they don't level alts, it decreases the amount of high levels you have to contend with. It's a stupid rationale, but I've heard that argument by greifers in the past.
As to my dislikes
Gilgamesh, I have decided it was immature and will be removing them. However, your disagree without justification in the Lucasfilm purchase by Disney thread proves you wrong. I also know it's not the first time.