After you have boosted and your SPM is around 600-900 go ahead and lay in a corner of a map during an entire HQ game. Do not bother with anything. Just lay down prone in the most random spot and dont move. If the enemy kills you, just go to a different random spot and hide.
This way your SPM can lower and you wont look as much like a booster.
Have seen this happen on NUMEROUS occasions now. Are people really THAT pathetic?