I don't think you understand the rules. You are on the side of the villagers. You are not supposed to give the aliens any information at all. 
Get it right, Thork, youre hanging by a thread.
The tinfoil hat can also reveal the MIB and the survivalist.
Look at it this way - everybody has their own idea at the moment about who is an alien and who is not. Right now, nobody has more reliable data than anyone else other than hunches, which so far have been proved completerly wrong. The only information you can trust comes from the tinfoil hat. However, if he does not step forward with his identity, his information will be treated as no more reliable than anyone elses.
But owning up to wearing the hat makes you a target of the aliens. They dont want someone saying who they are. But they also dont want to abduct the survivalist, and would quite like to bump off the MIB. The ability to reveal the identity of those characters is what protects the tinfoil hat from automatic abduction once he is out in the open. If the aliens are smart they wont nab him right away but try to subtly persuade him to give them the information they need to last as long as they can.
In summary, unless the tinfoil admits who he is, he has no role in the game above that of a normal villager. And in order to survive abduction, he has to be on nobodys side but his own.
But if you would rather not know info on who is who... *shrugs*