In reply to:
How long have you had your account here? It's not unusual for all the new users to get lumped together on the same server, which means that a good portion of those new users will experiment with software that drags the server down. Eventually, it smoothes out. I'd just keep nagging Support when new problems pop up.
It seems out of line to have to pony up for a PS account *just* because other users are hammering your server. If you don't need PS resources, then it doesn't make sense to have to pay for them.
I agree with Scott that anecdotally, the older your server, the better your neighbors.
I got PS service for the similar reasons to why the OP is considering it. I don't want to be beholden to the good behavior of my neighbors. Yes, Dreamhost will kick them out when they find these bad neighbors, but in the meantime my house will be wrapped in toilet paper.
I have very low traffic sites but I want them to be available when people do hit them. This means I can get PS but fit within the minimal plan, so it's not that much of a cash outlay for me.
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