Hiddlestoners are more than ordinary "fans". They will adhere to three or more of the following criteria. A Hiddlestoner is:
Someone who repeatedly spams their blogs/tumblr/forum with images/gifs of Tom Hiddleston.
Someone who sketches him obsessively.
Someone who plasters their walls/folders with pictures of Hiddles.
Someone who uses the word "Hiddles" in a real conversation.
Someone who belongs to/has set up a fan club devoted to Hiddles.
Someone who has actually plucked up the guts to send him a fan-letter.
No, I'm a Hiddlestoner.
That girl dumped me after she saw Thor!
Don't take it personally mate. She became a Hiddlestoner! No one can compete with Tom Hiddleston.