I guess falling asleep is one theory

... My theory on this phenomenon for what it's worth is the reader completed reading the story, but instead of closing when finished and signing out, they just clicked the X in the top right corner, which would make them appear on line and gradually disappear off the list. This could happen for several reasons. It is possible they just couldn't be bothered clicking more than one button to close pages and log out properly....or they narrowly escaped being caught out reading LSF stories by an inquisitive family member, or visitor

(I have been in this situation myself haha!) :-P ...Another possibility is that they were distracted away from the computer and left the page open with the intention of returning to it but got auto-signed-out before they had chance to come back to finish reading it:confused

also a situation which has happened to me)... I very much doubt that a person would fall asleep with boredom on this site haha...especially when reading Mr Marlowe

... and if a reader finds that a story is not to their taste then they would most likely close it after the first few paragraphs and then find another one which appeals to them.