I'll go ahead and note that being a really recent immigrant, moving to Balmung was one of the best moves I made. Because the server is full of actual players, it's difficult for bots to even create accounts...

So, I think a general solution to it all is for SE to offer some free world transfers to accounts that have had at least 90 days or so and that they close emptier worlds because they'd only be filled with Spam bots anyhow.