Tinhatters are people who think actors are hiding real-life relationships with each other, and Supernatural's tinhatters are particularly rabid. They think the men who play the brothers, Jensen Ackles and Jared Padalecki, are in a romantic relationship with each other, and that the actors' drop-dead gorgeous wives are beards. Said tinhatters are viciously misogynistic and, obviously, completely deluded.

I could be unfairly impugning this person to think she might be one of them... but she's just pinging that way to me, what with the classic misogynistic yaoi fantasy.