One of the more controversial rules in today’s IBJJF competition is reaping the knee.  Make no mistake about it.  It is dangerous.  Back in the day many people were injured from knee reaps with the intent of pressuring the knee.  Modern competitive Jiu-Jitsu is a highly specialized and developed sport.  The rules in place are to protect the athletes in training and in competition.  If you want limited rules and increased risk of injury then MMA is your sport.  But the overwhelming majority of us have to work for a living, love Jiu-Jitsu and want and need to be on the mat recreationally.  Losing mat time due to injury is depressing.  Losing work or suffering through work due to an injury you suffered during Jiu-Jitsu training is equally depressing and can be financially damaging.  The rules keep us safe and I’m grateful for them.
Check out this leg rap, I mean reap!