Does anyone know of a place to just buy one of those belts that tells you which way north is? I’ve looked and can’t find such a thing.
Am therefore probably going to just make one, are there other things that it’d be useful to sense in a similar way? The first thing I think of is just the time, but maybe there’s something better?
In a situation this specific, it seems to me to be worthwhile to reply exactly once, in order to inform other readers. Don’t expect to change the troll’s opinion, but making one comment in order to prevent them from accidentally convincing other people seems worthwhile.