I disagree, the entire point of the slide is to mess up the double play and get the runner safe at first. The infielder who setup the play is at fault, not the runner. The thrower shouldn't be running 10 feet away from the bag either to make the throw.
Don't try and turn the DP/don't play INF, if you are worried about getting taken from underneath. Tag the bag and take the 1 out. It's part of the game.
Like you said, it's totally legal, and if MLB wants to correct what some people (wrongly) are calling bad intentions, then they need to fix the rule of "in the area" for INF. Obviously MLB thinks its fine because its been around forever.
Fuck that noise.
It's the fault of the runner. Interrupting the double play is one thing. Sliding at someone with your legs at knee level is another. What the fuck is the point of kicking your leg in the air while sliding at someone? You're afraid he's going to jump over a normal slide and make an all arm throw to be the runner to first while fucking airborn?And we're talking about someone with a history of wrecking people's knees.