Much of day-to-day life involves the knowledge (and practice) of unspoken rules. For example, here in New York, you should not be putting a bag on a subway seat - and you should definitely let people get off the subway before you get on. They may seem like universal forms of etiquette , but more people seem to ignore them than we think. Recently, redditor u/HAXposed asked the site's users to share the unspoken rules that, when broken, annoy them the most. And it's sad but validating to see that…