An amusing play...but a bit of a douchey play. You're not teaching the kids anything useful in terms of football by doing that. Reminds me of the similar play in little league baseball with runners on first and third the coach would have the runner on first just start walking to second. The play relies on the pitcher not knowing what to do and bad throwing errors to allow the runner on third to score.
Teams were still trying that on me in high school games. I'd usually drill the next batter.