No, I'm not saying that. Initial setup, done properly, doesn't take up any more resources than a site that's been running for a while. What I do think happens is that people who are kicked off of other web hosts for using more resources than can reasonably be hosted under shared web hosting flip to Dreamhost and set up shop here, where, surprise, surprise, their sites use up more resources than can reasonably hosted under shared web hosting. This creates problems for everyone on the "new" servers until these people can be identified and either moved to dedicated hosting or can be kicked out to cause problems at some other host.
I think it's a decent idea, but I don't think it's necessary to actually move the good folks. You just need to kick the baddies out entirely. Eventually, the new servers fill up with good people and new signups are assigned to a different server for new folks.
I actually think this is what naturally happens without any intervention and is why most of the complaints are from new signups rather than people who've been here for a few years.
It's all pure speculation on my part, though.
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