Good grief, she asked a question, she didn't ask for a lecture from a bunch of activists who can't function without telling everyone else they're wrong if they don't agree. :roll:
In answer to your question, I would pull the other front shoe if you want to ride. I've had no problems doing it, and I certainly haven't had any problems with excessive growth or chipping since my horses feet are properly trimmed before every reset.
I would also ignore anyone who seems to think they know your horses feet better then you do without knowing the facts. Oh right, I forgot, barefoot fixes everything! That's why they're pushing boots right?