I would like see you running full speed with someone coming up the line at you, make that 3' move left or right. The burden to avoid collision is on both players. She can't come up the line and block it without the ball. Have you ever ejected a defensive player because of collision? Yet, catchers BLOCK the plate givin runner no access to slide. Collisions will always happen unless defenders are taught to NOT block base or plate. Call both sides of it or stop calling it.
And that is why there is an obstruction rule.
And how many obstruction calls have you witnessed at the plate? How many kids have you seen ejected because obstruction caused collision?
My point is perfectly proven by your post SoCal, you are putting the responsibility of the collision solely on the runner. It is not about the smarts of the runner but more their reaction time while running full speed. Your post indicate you will eject runner all the time for collision. We always teach our girls to avoid tag, ALWAYS but that does not mean a defender will not get into their baseline and cause an unavoidable collision. You need to see both sides of it. My dd is a catcher and twice this weekend she had girls try and run her over, twice the weekend before too. Umps did not eject anyone, and they shouldn't have either. You would have ejected those girls and would not have been fair. Do not call it thug ball or imply i coachbthat way.. Sometimes collisions happen and it is part of the game. No one should be ejected and there are times it is malicious and someone should.