Most of the time, when Blizzard makes changes like this, they aren't actually targeted at twinks -- they're just designed to keep the game from becoming extremely easy at a given level (I'm still bummed that my Leatherworking drums have no effect after level 70). But obviously twinks are affected by these changes, and as you can see from the comments on that post, they're not very happy with having even more limits placed on how they can buff up.
But then again, as I said a little while ago, twinks have always dealt just fine with limits. Twinkinfo has a poll up on what twinks will do if these changes go live, and the majority of votes say that they'll just keep twinking. They've gone around level restrictions before -- a few more won't be the end of the world.