Suing would not help your babyThat's what parents are for (not Disney or anyone else) It is our responsibility, as parents, to access situations, and protect our children to the best of our ability. Call me super cautious, if you will, but when the infant has no idea what's going on, this is strictly for the benefit of the parent (adult) and I wouldn't do it, and I'll always cringe when I see it being done. I will decide what I "feel" is safe, not Disney, or what anyone else is doing. It's your (general you) choice to do whatever is allowed, it's my choice not to, and to cringe when I see others doing it.
Of course it's the parents responsibility to make those decisions. And as parents, we use input and knowledge from other people to reach a final decision. I don't know the workings of a ride system and what the risks are there.
You may disagree for your kids, and that's fine. But it doesn't mean I (or Disney) is wrong in general.
And while suing won't help your baby in the case of an injury - it would still be a valid lawsuit. I'm not opposed to people suing corporations for valid reasons.
I'm pretty confident that my kids are much more likely to be injured in a car accident, or doing any number of other activities that we do daily - than they are on TSM.
I just wanted to know if it was allowed. Clearly it is and clearly everyone can make their own independent decision as to whether that's what's right for their child/family! 
