/soy/ - Soyjaks

What's the guy with the "though" necklace supposed to be? Is that somehow related? I'm guessing yes, since I once had someone freak out at me on /jp/ in a touhou scenery thread for the seemingly inane reason of me saying though. I was completely and utterly perplexed, and kept asking sincerely and kindly what was going on, but they just kept posting wojacks and incredibly strange things while never answering anything. I don't understand how that word could tip someone off so much, but I was even more befuddled by the fact they had relevant images for it, like this was something they regularly did! But now I seem to have found the source, if I'm guessing correctly: it's some Wojack-culture inside joke. But I still have no idea where this odd culture comes from.