I agree with you on this. Even though I am an adult (33 and counting), I'm sure there are plenty of PBers out there who are under the "appropriate" age. I see too many on all the webpages around that I generally don't even notice the ads. But I'm sure others do, and as such there is an obligation to make sure material and ads are appropriate for everyone on a given website.

Just my 2 cents worth...
~ Bill