Is there a way you can set a password so that nobody can play your ps3 without knowing your password? Is so how can I do this? Thanks.

take out the power cord and hide it/lock it in a closet...

ahahaha nice hephaestos. but no there is no way to do that. online accounts are private tho

Yes there is go to your user, its on the left side of the xmb and press triangle.

I'm not new to ps3, I could just never figure it out. lol Just saying. Thanks to everyone who responded.

What about when I turn the system off? Will this change stay or will it reset when I turn it off?

Im going to check right now

hmn.. idk it had the option, now it doesnt.

hmm thats weird. Hopefully an option like this comes? I don't know? Thanks for checking!

There probably is an option under Parental Controls. I'll check it out too. Be back in a bit.....