I don't know if I'm just soft or soppy or something, but suggesting you beat your brother up for controlling your time on his Playstation 2 seems really unfair. Yeah, I think it was really childish of him just to turn it off like that but if you didn't have his permission to use something that belongs to him then you shouldn't have been using it. Seriously, have some compassion: how much would you like it if it were your PS2 and someone else was just picking it up and playing with it whenever they felt like it even if you didn't want them to?
Besides, you know, the less dominant party always has the parents on their side so if you do beat him up he'll just have your parents stop you playing with it anyway. You've gotta be a lot more sneaky.