I certainly dont support breaking into peoples computers to cause trouble either.
However like I said if you have permission to do it, go for it.

I had some try hard telling me how he was goin gto "HaXX0r"my computer....I told him to go ahead....he pinged me.....that was his attack...his attack was ping my.ip.addy....I mean really....if this was a hack attack then game servers all  around the world would crash every 5 seconds.