Parenting advice

I belong to a very popular parenting site where you can find out all about having babies, making babies and raising your children. Anything you ever want to know about children is supposedly on this site. Well a section of this site is forums where you can post questions or pictures and others on the site can give you advice. Sounds great right? Well not so much, so often I see such horribly rude responses to peoples questions. Sure I don't like all the questions, to be honest I think many of them are ridiculous. For example: Is it time to take the ride on away? The persons son was too big for all the other baby toys but they needed advice on if the child was too big for the riding toy. Hello! When do we stop letting other people parent our children and take it into our own hands? I stray, back to the topic. I don't like all the questions but if I don't have helpful information to share I don't say anything at all. Something my mother always used to say to me and I'll always say to my child, "If you can't say anything nice don't say anything at all" Really is it necessary to say to a mother who asked the opinion of others about a 4 year old being ok in the bath alone, "you knew you were giving them a bath why didn't you have the towel with you" how does that help her? I just don't understand why people can't just give advice if they have good advice rather than ridicule someone for asking the question.