After watching numerous events I've noticed that pinning doesn't seem to be called consistently. One thing I've noticed is that at some regional events pinning seems to be called even when robots don't seem to be pinned. In the following video I noticed that pinning was called immediately when 2907 makes contact with 1540. I've now seen this happen at multiple events and I'm wondering how this will be called at worlds? I'm not sure I agree that this should be called pinning as 1540 clearly wasn't prevented from moving in any way. What does everyone else think?
https://youtu.be/DdYG77EmItc?t=1m52s