Other than the the PITA of opening up the frig every time you feel like switching and dumping a couple of ounces, sure, why not. Go wild, think out of the box, and put the switching outside the frig!
"Beer, well respected and rightly consumed, can be a gift of God. It is one of his mysteries, which it was his delight to conceal and the glory of kings to search out."
The Search for God and Guinness by Stephen Mansfield