I haven't done it myself, but I've thought about it. I posted something on this on another thread a week or so ago, but that was about freezing all 3. I think the way it works is your current creditors can pull whichever bureau they want, so they might be able to pull your Experian even if you have it frozen. I'm not 100% sure on that, that might fall under your scenario "B". As far as new creditors, from what I've read aside from Amex they will pull whatever bureau you have unfrozen. If you do try this, report back on what happened.