[Paladin2]

"We would not know if the dog alerted or not."

A $150 video camera could easily capture the dog's behavior.

[Vendome]

It sure could and you can just imagine how delighted the Border Patrol agents would be, knowing they are being filmed by you.

Them filming you, Okay. You filming them, Not Okay. Imagine broken stuff, erased, confiscated then lost. Maybe a broken finger or some bruising from when you “fell down”.