Lax Presbyterians?

Lig, thank you for your thoughtful posts on reading.  You are an example here to us, as you are in so many other ways. 

Now, a question: because you guys "baptize" babies, does that mean that you have lax attitudes toward church membership, "lax" in the sense of not trying to have a regenerate church membership, as Baptist churches (at least officially) do?  Is it "Donatistic" to only allow credibly professing believers to come to the Lord’s Table?

Inquisitively yours,

Mark.