Sorry what nelli said above. Rep can also decrease.. IF you click the REP button and choose "I DISAPPROVE" it will go down.
and from Inside news, Soon there will be new feature for "thumbs down" .. So you can decrease someone respect.
Of-course, there will be some conditions, to prevent misuse.
I would choose not to close this thread for now!!
Thanks
But ppl will go to make its misuse how u will stop it? what's the condition?