Magneto was probably worried about them, too. But you don't need to warn Storm about the dangers she's already aware of. He wanted Storm to keep her...
The Prime Sentinels are technically cyborgs, but yeah. And Spider-Man has the Living Brain and the Spider-Slayers as robotic enemies, if we can keep...
Presumably in jail as of the end of Hallows' Eve's mini, but she did seem pretty confident that she'd buy her way out, so if she shows up again . . ....