Report them. We can't possibly spot all of them, the forum is quite large and we stay quite busy. As for the tickers--I'll get clarification but if the person already has a baby than we won't stop them from using the forum, just the TTC areas.
I'll speak to other admin but right now I don't know that it's a possibility. The TTC area is for everyone who is TTC (over the age of 18).
My suggestion is to make a young mothers TTC thread (18+) in the TTC Groups and Discussion area so that you can speak with women who are in your age group about TTC. And if you see a post/thread in the TTC area that you feel is judging toward you than report it so that we can look into it.