@closerlook
Your explanation could be fairly described as a cosmic accident.
What is the more plausible?
1. That someone from Canada visited a site in the US (such as a coffee shop) which happened to issue him the same IP as an American 2 years later. And that the same US citizen sat in the cafe for a span of about 3 hours posting to a Canadian stock forum that he has never participated in before. Not only that, but he took care to complete his profile (how many of you are from Australia according to your incomplete profile?) indicating his American citizenship, with a 'US' in his username, and NYSE avatar. This profile was completed before he made his first post. He was unable to give any details about the event that couldn't have been fabricated or gleaned from the videos we all watched. He would proceed to make 7 posts describing a buzz about Ajit&GF and his Wall St. buddies beginning their DD. And this same person refused to answer another posters questions via inbox, and apparently nuke his own account rather than to explain his situation.
OR....
2. A poster from Agora stopped posting under his old alias after his stock took a bad turn. He wants to start anew with a fresh handle, and an interesting back story which makes him the center of attention. He sets up his profile quickly (he's done it before) and begins his new life. He never suspects that his IP has survived renewal for 2 years and is surprised to be called out so quickly.
Personally, I think #2 is the more plausible.
Moral: Be Yourself!
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I should say that I have recently subscribed to a VPN service allowing me to "relocate" my online identitiy. In the future you might see my IP match someone elses who happens to use the same VPN as I do, and who was assigned a temporary IP that I was assigned.
If/When this happens it shouldn't be a problem because I don't plan on posting about any other stock. And you all know me about as well as you can know anyone online:)