Doesn't add up. You don't get banned from Reddit simply by being added to the /r/reportthespammers subreddit, and there's no way he would know that the vote was 2 to 3.
You can see the up/down votes for a post. It's available via the API, and the Reddit Enhancement Suite.
That's just people who happened to vote on a particular submission in a particular subreddit. This is not Alexis Ohanian personally clicking a "I agree to shadowban gms8994".