....
Okay, your account will be banned 
FB bots check the page at least every 24 hours (this is in the Dev/API notes), they will cancel your ads and potentially ban the account if they notice a 301 or anything different.
@ redrummr - one trick that used to work for me in the past was to put a geoip redirect script in front of lp, name it index.php which redirect to home.html based on ip location
do you think this still work, bots will detect it?
There is nothing inherently wrong with redirecting... I was just illustrating that you can't just do a 301 after approval, because the page was cached on review/first bot visit and the difference is too much (no 301 --> 301... suspicious). Your method is good, no1d, there are legitimate uses for this so it's not a problem.