This, of course, is not the only thing that's wrong with the way she does things. I've already covered how she assumes that we know facts that she keeps to herself but what I failed to mention is her unpleasant habit of failing to have asked herself if her experiences in Lynn Lake made sense in the suburb of Ontario in which the Pattersons live. Take, as an example, Mike's struggle with his Halloween costume. As forworse said, Aaron's attending a Halloween party in a church hall instead of trick-or-treating would go a long way to explaining why the wings had to fit through a door. Since Lynn tried to combine her real-life experience with the Pattersons' lives in a manner that made no sense, she ends up failing. A lot of the more baffling plotlines are probably the result of her doing that.
Looking back, I realize that I already said that when I speculated on the subject of how many strips that have John and Mike not getting along as well as they should would make a damned sight more sense if John were Mike's stepfather. That's the thing about Lynn's bad writing, though; just as she repeats herself, we ourselves are forced to as well.