Most parents don't even care what their kids eat -- as evidenced by the alarming rate of obesity. I've seen toddlers drinking Coke.
Given the evidence, do you really believe parents care what toys their kids play with?
Some do, some don't. I'd wager there is a good number of both. I'd also wager those who don't care form a larger group, but that those who do care form a noisier and more adamant group.
If those that do are interested in organizing a boycott, and if they can make a big enough stink to be effective (somewhat doubtful), then they're welcome to do that.
If not, they can at least watch out for their own.
For me, I don't think what toys kids play with is so very important, but I think the issue is interesting as a symptom of various other things - inept parenting, change in standards for women, etc.