Might not be the biggest exploit in the world, and it might not even be an exploit. But I am sharing it here because I had alot of fun with it in the last few BGs and was curious if I am the only one doing it. The achievement School of the Hard Knocks for childrens week has alot of people trying to capture flags and since the week just started EVERYONE is going for the achievement. As my paladin needs the achievement also, I decided to take an advantage in getting the achievement be casting Hand of Protection on people who are trying to capture the flag in front of me. Not only does this give me and open chance to grab the flag in front on one ally, it is tremendously funny. Enjoy!
Also, if you don't have a paladin, maybe this thread will help you avoid the embarrassment of this happening to you. Just right click the buff.