Mrs. Gargoyle took an electic heating pad (about 14 x 18", not a blanket) to Italy in November. I can't recall whether it was in checked or carryon, but either way, it didn't get a second glance.
She then took it to France in Dec., and that was definitely in carryon. Also back to Italy yesterday. No problem on any of those flights.
Should we get a separate FF number for the heating pad, so it can earn EQM's?