After moving 5 spawners from our grinder to new place, Piggles and I realised we can't place them anymore!
It's hard work to get to the point where u can move and place them.. and we have around 15 totally useless spawners in our ME now..
I don't really see the point in banning their placement since we can use Cursed Earth that spawns even more mobs much faster, just we can't choose which ones that way..
MFR Auto-Spawners are useless without regular spawner, cursed earth and similar ways to get essence, since they use more mob essence to create new mobs then they make by killing them..
Also regular spawners don't spawn too many mobs and are very slow..
this way we have destroyed ones we found by picking them up what we wouldn't have done if we knew this would happen..
Please consider re-enabling this feature
Actually I still don't know if this is a bug, maybe like the permissions problem we had, or was this added as new configuration?