Cheater ideas?

Any ideas on fighting a cheater? Creates dozens of silver carrying alts. Uses bot generated fake swarms to divert. Builds nothing. Caps cities with baby-alts. Devs are silent. Is this just a massive gameplay flaw that spells the end for anyone on a server with one of these cheats? Anyone found a way to counteract this cheatplay without resorting to the same cheat tactic?

This sounds scary