Let Thralls Decay PvE/PvE-C

It would remove a good amount of server lag if you allowed for thralls to decay on PvE and PvE-C servers. I play on an official PvE-C server (1941) and there are dozens upon dozens or thralls from abandoned (and demolished) bases just sitting in the air or on the ground. It seems to me like this is an unnecessary waste of server resources, as well as a breaker of immersion.

Just a quick update - our server is starting to get a slightly absurd number of thralls just floating in the air where bases once were.