He operated it within the confines of someone else’s private property below the roof line, low enough to see under a patio. Earlier the daughter “shooed” it off and the operator moved it back and then it returned, and stayed there long enough for the girl to go inside, get her dad, and for him to get his gun and go outside.
That may or may not be what happened but it certainly wasn't reported that way in the original Daily Mail article.
It's funny what people choose to project onto this situation. For one, it wasn't reported that the man's daughters were sunbathing. They did say that the neighbor's daughter, who was the one who waived at the drone, liked to lay by the pool.
Also, if the girls told their father they were disturbed that there was a drone in the neighborhood and then went back outside to sunbathe until it came closer, well...
Face it, we don't know what happened but the whole Peeping Tom thing is total speculation.