I don't buy many used games, but if Sony did this I would never buy a console from them ever again.

i think it's good... now they won't moan about both secondhand games and piracy killing videogames sales.. now they'll only moan about piracy...

if we only had ninjas...

If anyone except a mod had said that..

I know, the site's biased against you MS guys.  

It's okay to tell a joke once in a while.  It's not like I said something about the game being crappy or anythng like that.  I just said that the sales are disappointing and I don't think that anyone would argue that.

Actually there was something in there about a "bone marrow biopsy". Anyone know what's that about?

I liek this idea, i buy only new original game and I don't have friend... nothing will cahnge to me

Somewhere.. someplace.. an employee of sony reads this and is gonna implement this.. couldn't you just say something like: "using ps-eye to scan your eye and unlock your game disc." but noooo... you had to go with "bone marrow biopsy"...

i don't buy used games, so it doesn't bother me.

Aiaiai, please Sony don't go down that path. It'll only cost you hardware sales (and thus software sales which ironically you are trying to prevent).

This doesn't just affect you buying a used game, this has major repercussions.
This means you are unable to lend a game from a friend, or take a game with you to a friend's house to play. Unless you bring your PS too. You can't even get multiple consoles in your own home, because you can only play the game on one, unless they let you 'sync' the two consoles and it's accounts somehow.
Also, of a little less importance but still a direct consequence: In the future, there will be no retro-market for the console that implements this. Once someone buys this hardware or a game, it's value is immediately near $0 because no-one else can properly use it anymore. Some buyers get certain consoles as an investment to, and this won't be a good investment anymore.

Bad, bad idea.

Personally, I don't like to be 'enslaved' so to say. I'd like to be able to do whatever I want with the stuff I buy for eternity.