I agree that it was rude and unnecessary, but I don't agree that it was disproportional. Saying that anyone who finds it a worthwhile utility to be able to find their kid with a geotracker is a shitty parent is an asshole thing to do; it's shitty, you might say. I mean, I don't assume that anyone who leaves their kids at the park unattended is negligent. They might just have a kid who's capable and responsible enough for that kind of privilege. But many kids aren't that capable or responsible and need to have a parent around at all times. One isn't necessarily a better or worse parent for it, they just have kids at different levels for ANY NUMBER of reasons. Maybe their kid is adopted, came from a history of trauma, has a history of elopement, is on the spectrum, or any other type of potentially "invisible" disability that might mean they appear to most as a "normal" kid, but actually needs some extra attention, focus, or restriction. I think calling someone an asshole for making a blanket statement about a pretty mundane and typical tool being used is appropriate. They were being ableist at worst, and just kind of ignorant at best.