Sideways, stopping damage from the kick is as simple as lifting your leg and checking it.
If Rampage doesn't like checking leg kicks then that's his own problem. It's a legitimate technique and if you don't like what it feels like then block the damn thing!
I have had that kick thrown on me hundreds of times and i've never hyperextended my knee or done any real damage, Rampage's lack of defense is the problem here.
I'm really excited for his retirement, I can't believe how I could like a guy so much only a couple of years ago to now looking forward to watching him get beaten down by Glover.