I also recall a few years back there was a man charged with a felony for "digging fossils" with his son in the wrong place.
And a man charged as a sex offender for grabbing a child that ran in front of his car (to lecture him).
I found another where a man was charged with felonies for throwing seed pods at police, but that's not really an "every-day accidental crime."
So, yes, most incidents are misdemeanors, but if you commit them in the wrong place, at the wrong time, or with the wrong people present, it can be a felony.