I'm sorry, but what effort goes into finding any online magic seller? I don't post much, but really, magic is easier to find today than it ever was. Whether someone finds T11, Ellusionist, Penguin, or anything else, it's all only a Google search away. Finding a magic store online is one of the easiest things someone can accomplish today. A bit of searching for David Blaine or Criss Angel, and they're here. A few dollars later, and they have some DVDs, custom decks, etc.
I've seen this "worry" pop up time and time again. And yet, nothing ever happens. How many tens or hundreds of thousands of Svengali decks have been sold at malls, in airports, in toy stores, and cheap magic kits around the world? How many thumbtips? These are all real brick and mortar venues. Despite the wide exposure, I'm still able to perform with both items and fool the pants off people.
Picking up a deck of T11 cards in an actual store isn't going to make T11 any easier to find than it already is. Those who are interested will explore the site. Those who get bitten by "the bug" will stay, and hopefully grow into great magicians. Those who don't will leave in short order.
Magic has to be accessible to laypeople. If the secrets aren't shared, then the art would die out. We all started as non-magicians. Nobody kept us out of the game. We were welcomed into the community, and were allowed to start learning just like everyone else.
Not to mention, many people nowadays actually use cards for playing games. It's a shocking thought, I know. Lots of card enthusiasts out there like cool-looking cards for their games, and could care less that a "magic company" designed them.
If anything, we should look on this as a good thing. If T11 is able to get their cards into stores on such a wide basis, that allows them to earn more money, which they can then put back into their company to create more releases for us to enjoy.
But, no, you guys are right. Nobody should be able to find out about magic at all. That way all of the magic companies can go out of business and we can all be forced to start using our own creativity....