This is very common. As there is almost never any person to person contact over chatrooms/forums and whatever the personality taken can be, and very often is, totally different to that shown to the outside world.
This is how eighty year old grannies can come across as steaming sex sirens to fulfil some sort of fantasy of a life wished for but never attained.
This is how fat blokes with beer guts, bad teeth and smelly breath (and feet) can come over as tanned muscle gods.
This is how middle aged men (and women) lure unsuspecting teenagers into situations that they would prefer not to be in.
This is how - - - - -