The company I work for has very specific email signature rules. They gave us the font, font size, color, and what information to be given. Name, address, phone number, email address, and preferred pronouns (optional). Nothing else is acceptable. Yet people add "inspirational" quotes, jokes, "have a good/nice/blessed day" - they use weird fonts and colors. It annoys me, really only because we are given clear instructions and these people think they're... what? Too creative to follow the rules? Too punk rock for this? I guess I really don't know why it bugs. It just bugs.