Bitcoin double spend: Is the Glass Hunt exploit a scam?
Does it Work? Has somebody created a simple tool to enable a double spend?

Free Bitcoin, YES!
I'm guessing by now many of us have seen the video released earlier today;
... or read the articles that are circulating, regarding the supposed hack and tool that now allows you to simply and deliberately double-spend a bitcoin. A group of supposed "South Korean" hackers, who strangely seem very American seem to have put a lot of time and effort into creating a tool, website, and some marketing to discredit Bitcoin. They claim to be benevolent but its not hard to read between the lines to see a vested interest.
Published on Sep 14, 2016
"Double-spending" Bitcoin -- the process of making someone believe you sent them funds when you didn't -- used to be only for the tech-savvy. Thanks to Glass Hunt's new web-based double-spend tool, however, it's now easy and available to all. The South Korea-based anonymous hackers -- who actually want Bitcoin to succeed -- reveal their motives in this anonymous interview by Amanda B. Johnson.>
So...
Anyway, the concept that a double spend could be initiated on zero confirmations transactions, seemed interesting enough and plausible enough to warrant further investigation. So I decided to follow the instructions in the video and try for myself.
It all seems simple enough, just follow the guy on the video.
3 Simple Steps:

1. INITIALIZE
2. SEND FIRST BITCOIN
3. DOUBLE SPEND
Step 1: Deposit some BTC into the Glass Hunt address given to initialize the process

I sent a small amount of Bitcoin to the address and after failing several times, it appeared in my Glass Hunt account. I was now ready to proceed to Step 2 and begin the double spend.
Step 2: Input the address where you would like to send the BTC

I picked a random gaming site off the internet which accepted zero confirmation deposits and anonymity to begin gambling. I input the btc deposit address as per the instructions here...
Step 3:
...And that's where it ends...I can't make it past step 2 to step 3. It just keeps returning an error, and that is what it's been doing for the last 6 hours. I asked a fellow crypto associate to try the process, and they reported the same result, as do several of the comments appearing under the origonal YouTube clip which was posted.
So, is it a scam? It's too early to say for sure, or is it just somebody snubbing their nose at Bitcoin to leverage their own coin? Interested to know what others think of this situation. I have sent Glass Hunt an email and informing them of the error, and if they reply I will update this post accordingly.
NB. I was attempting the double spend for research purposes and if successful, intended to return any coins which may have been gained as a result of the double spend.
If you would like to try for yourself then simply click on the link to go to- http://www.glasshunt.co/exploits/bitcoin-double-spend/
This is why you never accept bitcoin transactions with zero confirmations. This is a simple rule that everyone should abide by. 3 confirmations should be a minimum.
Smells scammy.
Tried it myself, its been 3 hours that i am getting try again error.
take the Glass Hunt wallet address they gave you and the private key also provided. Input them into a blockchain.info wallet and get your coins back.