Couple of comments:

1. Fred's statement about "unashamedly" teaching the doctrine of infant baptism is very pertinent. I've sat through many baptisms at a PCA church where the Pastor spent most of that time apologizing for the practice to the credos in the pews.

2. A beloved brother I know has been a member of a PCA church for more than 10 years, is a youth Sunday School teacher and member of the 'worship team', and has remained a credobaptist all along. Great guy; weak Session. Never understood why we tend to let the theologically iffy folks have our children's ears, but it happens all the time, even where I am now. Recently a member who'd been teaching a youth class just up and disappeared without any explanation to the Session because the Pastor was wanting to know when he'd like to baptise his newborn. He was open about being credo when he joined, and didn't like that kind of meddling. After a conversation with me wherein I said that the meddling was a good thing from my perspective (a Pastor and Session doing their job), he spouted some NCT drivel and shagged.

All the ecumenicism aside, I don't want credo-baptists teaching my children the scriptures. I have credo friends I love, but on this I think they're wrong, and so (supposedly) does my denomination. So why would a PCA Session allow this sort of thing? I always get looked at like I'm an alien or something when I have protested it.