this means you can't sleep near them and automated defenses will attack them, that gets annoying fast

this is also what's causing #244

Additionally, the command /cofh killall removes them. My server runs that command automatically so no one can keep tamed baby spiders. :(

This also affects the Mystery Eggs which are the tamed creepers you get very rarely.

Very late response here. I cannot easily fix the killall thing from katubug unless that checks for IEntityOwnable; but this will be fixed for the next update.