Non-verbal language

There are many ways one can give one's message across. We usually do it verbally. But recently, though I've begun to realize this for so long now, I noticed that messages can be given across via photos. Whether they were posted deliberately or not, they sure cry out the message across. You post it as a wall paper on your laptop computer, inside your wallet/purse, inside a frame on your table, etc. If let say, in your purse, when paying up, you flash the photo around, the one noticing it will feel like you're slapping the message to his/her face so hard his/her face becomes numb. Get it?