the only time i side b is to close the distance or to go for hilarious game winning kills that usually work because people are stupid
both times that ive side b'd off the edge have been to win the game
also if you think any competent mac is going to just run in and get thrown off the edge repeatedly i think you should go to a higher level of play and say the same thing since anyone who knows what they're doing doesnt let themselves get baited into the same thing repeatedly