Plankton is one of the biggest ragebaiters I've ever seen.

In the Plankton movie, after seeing what Karen did to the Chum Bucket, he refuses to try it her way.

Karen even tells him to think about it, and he does.

He knows she loves what she's done, he knows the risk of what he's about to do, and he does it anyway.

His prideful grin and cheerful demeanor tells us that he's having a blast getting a rise out of his own wife.

Even after Karen removes her empathy chip, he doesn't regret a lick of what he did in the slightest until Sandy forces the chip into his brain.