Seems inconsistently enforced and most open to interpretation, more so than targeting even. Who defines in the area?  Also tipped balls apparently negate grounding in addition to generally being an excuse to mug anybody and not commit p.i. 

In a day where we are getting MORE rules, and more specificity to them, it seems weird.

How is this not grounding:

But this is? (I agree with Joel Klatt it isn't)

1 step sideways compared to the reasonableness of a completion seems weird if it was all about the tackle box, which I couldn't tell if Bryce was still in.