Kids will take any reason they can find to pick on somebody if they feel like picking on somebody. Anything that sets their victim apart from them.
They might pick on your kid exactly because there's no pictures of him on the web. They might infer from that that he's adopted, his parent's can afford computer, his parent beat him so badly as a child that they couldn't post his pictures because police would lock them up and so on.
You don't fight crime by second guessing criminals. You don't fight bullies by trying to imagine what excuse bullies would use to attack your kid. You just fight them as they show up.
> There are plenty of cases where embarrassing pictures went viral and destroyed whole lifes.
Same argument might be posed against anything that is even remotely fun or public or both. There are some people who gained massively from their pictures or videos going viral and overwhelming amount of people who gained or lost exactly nothing.