Thanks to this new mingebag war I managed to add a seal in the gm_construct 13 beta so you can contain 100% of the infestation while keeping the addons enabled!
Do this ritual close to the darkroom entrance (but not in front of it!) and they'll disappear:
The black spot only shows up when you get the position right.
But be careful! This thing is highly unstable once it's complete!! Do not to step on the black spot!
If you want to undo the ritual, throw some prop on it and protect yourself!
(oliver) mobenixcitizen2007 uploaded a duplicate of the seal so it's easier to be positioned. Subscribe if you want to save some time: