/x/ is the /nosleep of 4chan, don't trust stuff there, its all crazy conspiracy theorists and underage horror writers
EDIT: oh wait, its th3coolst3r, of course
youre a little misinformed
/x/ tries to be real most of the time. /r/nosleep is for horror stories that are untrue, but the rule is to not break that 4th wall, that's why there is /r/nosleepOOC
real life horror stories are /r/letsnotmeet but last time i visited that was 2 years ago, i have no idea how much credibility those experiences still have. look on the best of all time on both those subreddits and youll find absolute gold. e.g Penpals from Nosleep which got made into a thrilling book i'd recommend to any horror fan.
im rambling though, just know the difference between /x/ and /r/nosleep