Are You Annoying?
"And your periods and commas belong inside the quotation marks."
Not if you're a programmer -- see the hackers' dictionary. If the period wasn't in your quote, it would be inaccurate to quote it.
For example, telling someone that a command is "cd ../." would be more confusing if you didn't realise that the final period was a full-stop, and unrelated to the thing you need to type.