A Plea for Sanity
Can we take a step back and consider this for a moment. What really happened here is we had a troll make a post to try and bait users into believing their unsubstantiated answer. And they successfully got a few upvotes in the process, and people fed the troll. We got trolled, and some people fell for it. Welcome to the internet.
Getting trolled is bound to happen. We get a number of spam posts, a lot of crap and cruft from disgruntled users, a lot of bad answers, and yes, a number of fake posts. That's just a reality of being on the web. That's why the SE system exists. To improve the signal to noise ratio and get the good stuff up top, and bury the bad stuff (or delete it if that is the case). The system is already built to handle this.
We are a community of experts here. We love and are passionate about video games, and we ask and answer some fantastic questions. We collaborate, and chat, and science all in the name of having an amazing site, and I think we do pretty well.
Do you see an answer with incorrect, incomplete, or unverified information in it? Your votes are yours, but I'd recommend that you vote that down. Doesn't matter if they claim to be a developer, a regular plebeian, or the almighty Helix (praise be unto Them), they still need to show how they arrived at that answer. And if they don't, then it isn't really a good answer.
Who cares if they did code it
One thing I've learned as a software tester is to never trust the developer. If a developer says something like "It works fine, and this is how it works" then you can be sure that it doesn't work that way. There are holes, there are bugs, there are unplanned circumstances, and so even if it is the developer, a claim like "this is how it works" with no proof or anything to back it up is meaningless.
A developer's only advantage should be that they could, if they so choose, have an easier time setting up the circumstances because they likely have better tools. So, in your example post, it would have been awesome if the "developer" set up those exact circumstances, recorded a video, and showed it happening. That would be fantastic proof.
But, alas, they didn't. And it still got upvotes. Some users decided that a person on the internet saying "I am a developer, so X" was enough for them. It was their votes to use, and that's how they chose to use them. Nothing we can do about that. But if you think it is a bad answer that needs to be buried, you have the tools to do that as well. You can downvote it. This is a voting system and the votes are how we determine if something is good or not.
Don't Feed the Trolls
What I'm saying is that we have the tools to deal with this already. If it is spam, delete it. If it is so low quality it doesn't count as an answer, flag it for deletion. Otherwise, use your votes to express your opinion. And use comments to make notations on answers if you want others to hear your opinion to. Or post in chat. We have so much at our disposal to fix the problem.
Yes, we, as a community, got trolled. Someone came in, posted a bad answer, and ended up being net positive on upvotes for that answer. As of right now, they are now net negative in the voting, but still positive in rep. That's bound to happen on occasion. So we have a little noise as an accepted answer. That's not the first time that has happened, and it won't be the last.
So why in the world would we want to make some crazy site policy that will be near impossible to enforce, and discourage potential experts because one troll got past us? Why would we put what would likely be a herculean effort into verifying these people when the verification doesn't matter for a good answer? What do we gain?
All this does is feed the trolls. What happens when the first troll sets up a twitter account just to see how far he can take it? Or buys a domain name for the correct email? Or Photoshops a picture?
We are going to get trolled. And, yes, occasionally the troll will win. But we are experts, and the better we make our answers, the more the trolls stand out. And if we are unable to answer a question, then it probably isn't a good fit for the site. We have so many well researched and great answers. Make those the norm and it becomes very difficult for someone to troll. It will still happen. But if we do our research, and if we confirm answers, and if we are the experts we claim to be, then it will get by us far, far less.
Let's not overreact here. We already have a solution to this problem. Just hold all answers accountable, and this problem will go away. And if the answers you see don't satisfy you, then answer it yourself.