Who exactly is being "bombarded" with porn? Seriously, who? It's not like you go to Google, Wikipedia, Youtube, Facebook or anything like that and 6 porn videos instantly start playing simultaneously without warning. You generally have to be looking for it in the first place. I'll admit that sometimes one comes across it by accident, such as when conducting certain searches of an ornithological nature, i.e. great tits. (NSFW, but a Google Image search with Safesearch off turns up lots of birds and great tits hehe). The solution to that is to practice safe browsing. Use Firefox, Adblock Plus, NoScript, a good hosts file, and even OpenDNS if you so wish. There are more than plenty of tools out there for parents to safeguard their kids' online experiences. Hell, the ISPs are even offering help! However, the best tools of all are supervision and talking to your kids about what they see online. Oh wait, that would require people to actually take some responsibility for themselves.. can't have that! It MUST be someone else's fault, someone else's burden, someone else's responsibility!
The worst part is that groups like Safermedia never stop. They create the illusion of a problem so they can push their solution. They make it seem like the only reason they exist is to get porn blocked, but if they succeed they don't just say, "Job well done, let's pack it in," they find some new monster under some kid's bed to blow out of proportion. Where does "think of the children" stop? Where does the filtering stop? Who decides what gets filtered? Is the process transparent? Is there a way to get a site removed if it's added by mistake? Will it always be optional? Will Mother Government tuck us in at night and tell us nice, happy, censor-approved bedtime stories? "Don't worry, we've always been at war with Eastasia..."