They may not be intending to communicate it, but it's what they're communicating. Also, for my part, trying to have a conversation with someone who is wearing

They may not be intending to communicate it, but it's what they're communicating. Also, for my part, trying to have a conversation with someone who is wearing earbuds is irritating because of the clear indication that they're not interested or paying attention and therefore there's no point in talking with them.