So if it's being denied that the letters were "twisted", what actually might be? I'd say that very high on/top of the list comes the behaviour of a person who appears to have made their sole purpose in life to track down a fellow member of a forum to the extent that they allegedly know where that person is from, what they look like, which other forums they're on and who it is they converse with..........................without their victim ever having shared any of the information with them.
I believe the generic term for this action to be "STALKING", but there's also following, trailing, shadowing, sneaking, hounding, all suggesting that the person behind the action, at the very least, does NOT have their chosen victim's best interests at heart, and probably is possessed of a particularly sick and evil mind, and generally speaking, is probably someone one wouldn't wish to be known as being a friend to.