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I think RPB cleared it up pretty well. The rules arent absolute in the sense that you are here, you are guilty. You are walking your dog or eating lunch and you have no idea a school is there which is covered by knowingly. I take recklessly to mean waving it around or even firing it off (for whatever reason).
This thread is similar to the McDonalds thread. School is taking the kids to lunch so do you have to leave, I doubt it.