Oh, I get frustrated when people type things and use exclamation marks instead of full stops. If they are meaning to emphasize or give something they are saying an exclamation fair enough, but in normal text using them makes me read it wrong. I feel that they are having a go at me. What even makes me more annoyed it when people use three exclamation marks to end a sentence. It’s bad grammar for a start, but how much do you have to exclaim something enough to feel the need for the extra punctuation.
The same happens when people use more than one question mark. When people add extra ones on a question it makes me feel like they are stressing at me and want to have an answer immediately. It’s quite rude in my eyes.