[[Image:Tyra-banks28.jpg|thumb|300px|right|A secret message? Tyra lets the boys know they are Free to be...together]]
Tinfoil or tin hats is a term that originated from people wearing [http://en.wikipedia.org/wiki/Tin_Foil_Hat tinfoil hats] to keep out the "alien signals" and is generally used to describe the super paranoid or conspiracy freaks.
A fan is said to be wearing a "tin hat" or engaging in "tinhattery" when they are convinced they are being sent secret signs that their
boys are really IN LOVE and DOING IT , for example [http:// crystalchain. livejournal. com/ 54986.html secret messages] being sent through the clothing that Jared and Jensen wear. Blind items in gossip columns are also a common source of secret information.
Any information that appears to contradict this belief is rejected and said to be the work of the Network PR mavens or other evil doers (such as fake girlfriends). Weddings to people of the opposite sex are claimed to be merely elaborate means of concealing the true love, in this case of Jared and Jensen.
These fans adherence to their beliefs often manifests in extreme obsession with the topic, as well as expressions of hatred towards anyone challenging these beliefs. This may include direct attacks on people associated with Jared and Jensen through Twitter or blogs. [[Image: Tinhat.JPG|300px|thumb|right|2009 Winning Tin Hat by huggenkiss]] These people are a very small minority in fandom.
The majority of fans happily consume and produce fanworks based on the idea of a relationship between actors, and approach the fantasy in a playful way. These fans may make comments in reaction to a photo of Jared and Jensen together along the lines of "oh they are so in love", but this is connected to the fictional constructs of the actors, and the fan is aware it is not fact. These fans may use phrases such as ''I am putting on my tin hat'' to indicate that the author realizes the fiction of what they are saying but are happily indulging in their RPS fantasies.
An annual activity at the fan convention [[WinchesterCon]] has been the Tin Hat Parade, which involves fans making real tin hats out of aluminum foil.
See also [[J2]], [[Real Person Fiction]] and [[Tin het]]