I think it's fine to let people know if you don't want a certain toy be it Bratz, toy guns etc etc.
There are so many more appropriate toys to buy young children. I'm more of a books, clothes, crafts kind of buyer.
But I have had a bit of a giggle reading this. Alex (10) loves Bratz bolls, she's has a few which other people (not me) have brought her over the years but that didn't really start until about age 7. And she hasn't ever wanted to wear "a wide belt" as a skirt

She knows that the clothes the dolls wear aren't the sort of clothes I'd let her out in public in. Ah well I can't say I have really strong feelings about them now. But I wouldn't waste my money on them. I just think they are truely ugly.