Sounds a good idea but, as 'Best Answer' is pointless, I fail to see that there would be any advantage in having a further useless 'button' to press in AB.
Lets face facts. Best Answer was intended to give folk badges for success. However, the badges scheme has been a complete failure.
It is the case that I have Not been awarded for my 'Best Answers' but each day it is recorded that I have been awarded 'Service Badges' and that they were presented on that particular day. eg. Yesterday I was awarded badges for 1, 2, and 3years membership of AB. However,the day before and the day before that (ad infinitum) I was awarded the same badges..........Check yours.!!
Hans.