In the next version of the our mod, we could easily remove the remaining attributes that make the mines useful as decoys: lower the active signature of the airdropped mines to a level where they'd still be visible on HF, but wouldn't attract active torpedos in any reliable way; and the SLMM and mobile mines have already been fixed, as they stop generating noise once they have reached position.
MaHuJa, yes the mines do use a visual sensor, but the torpedos have no visual signature, so they won't trigger the mines.
Yeah, I would never use the mines as decoys anyway. Yuck!
I suggest that guide-writers take that out of their guides, BTW, but if you want to give the readers every possible advantage in games, then I guess you could leave them in, but I would take it out.