Well...
as an user: Yeah closing MY thread without letting me know any reason for doing so is annoying.....
but as an admin myself: Sometimes users don't know about
all the facts and sometimes they shouldn't know
So I'm closing threads too without giving any reason, don't you do the same sometimes??
Don't be annoyed, if you can't live with a closed thread, go ahead and ask a Mod (kindly !!

), Mostly you'll get an answer and don't need to bother
Cheers
'sid