Currently the requirement for selecting a solution to a thread is for veteran members who have earned 5 best answers, Moderators and the thread originator (OP), anyone that has less and even though they can see and select the solution button do not meet the requirements and should not be doing so.
I know. Someone came along who had not even posted in the thread and selected my answer as best. The thread was less than an hour old. I unselected myself as best answer and sent a message with the persons name to the mods. He had no business selecting a best answer in a thread he was not participating in especially one less than an hour old.
Although I did think I had the best answer. Guess I'm too honest for my own good sometimes lol.