People who think they’re an island. I don’t know how to describe it. People who operate like little effort should be expended on the fact that other humans exist around them and they’re part of society along with some responsibility for that society. Doesn’t matter if it’s stopping in the middle of a busy sidewalk in a group and blocking it, driving the speed limit in the passing lane, or utterly destroying the use of spelling, grammar, and punctuation in an online post forcing the reader to translate it into something meaningful. People unwilling to return the courtesies and efforts those around them offer by default.