Originally Posted by The Hag
Uh, pretty much all retailers. Apparently it is easier for kids to buy R-rated DVDs at places like Target and Walmart than to buy M-rated games. As a parent, I followed ratings in the sense that if my kids wanted to see a PG-13 movie (or later, an R-rated movie) I always checked it out first to decide if it was o.k. It never really came up with games though because they weren't interested in M-rated stuff.
That was always how my mom did it when I was younger.
Some people are okay with being carded, some people get cranky.
At Christmas I spend a lot of time explaining ERSB ratings to confused Grandparents.