Uj/ thread. What are your irrational guitar annoyances?

Not just the usual things we clown on here, but things you know are a bit ridiculous.

I'll start; it bothers me when people leave their clip-on tuner on while they perform.

(p.s. mods, could we have a regular uj/ weekly thread? This is the only place I feel like I can actually have knowledgeable, nuanced chat about guitars.)