This is actually incorrect. I looked as well, and @Candy Stick has posted in several other topics this year as well as last year. @Candy Stick has posted
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As well as several other places. While the vast majority of (his? her?) posts are in this particular thread, that doesn't give us the right to lock it simply because it irks you. If we start doing that, we would have to start locking every thread as soon as someone got annoyed which would pretty much stop conversation, and defeat the purpose of the forum. @Heatman made a very good point as well. If you feel the topic has run its course, you can always stop following it. Just mark it read and move on.