Haha spent some time doing that as well, though dog-fighting established griefers gets boring as well, as they just go back to the shop, tap their bucket of unlimited resources from respawning roids they've been harvesting for months.. and you've really accomplished nothing other than making them lose out on 10min worth of time
The best kinds are the ones who have community content ships just... lying around. Really takes the bite out of their bark when you "acquire" one of their flagships that they didn't put work into.
Honestly, your best bets are to keep an eye on when the larger servers reset their universes, so you know when everyone is back to square one. It's a lot easier to knock people down when they only have a couple months' worth of resources.
On the topic of this thread, Helkan and Thryn have, as Chev mentioned, settled on Hyper-Core. There's not much out there but wilderness and assholes, and the assholes are quieting down after being shit on by a faction that had only joined the day before.
If you want to shoot at people, I'm sure that HI would be happy to oblige you, as would we at Thryn. Just keep it civil, and I'll try to match whatever mass classes you guys are comfortable with using (as long as it's feasible with our current resource counts).