I prefer to block this stuff out of my mind. It's less painful that way.
Seriously, people need to stop getting their panties in a bunch over AO and some retailers just need to man the fuck up and start carrying that stuff.
Not that there really is much difference, one of the major reasons Z exists is because they have to ask for ID when selling it, thus keeping it out of the hands of kids. Anyone who doesn't look at least mid 20's buy an M rated game semi-recently? Yeah.