@rainchen this fails because of three reasons. First off photoshop is cheap and easy. Second off anyone can just pay someone on fivr to do this, even record a video. Thirdly accounts with rep will be sold if someone makes a high enough offer and someone with rep is trying to quit the game because they are bored, or needs more money for some unexpected life event.
You just can't verify identity and really you don't even want to open that can of worms, because then this place turns into the evil step child of reddit and coinbase.
You can assure one person one account though. You may end up with some people owning multiple accounts, but they can be weeded out easily. Essentially a cheetah like system for sockpuppets.
Gotta have bots for that though and a lot of them because this is a ton of computing power we're talking about.