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I got a couple of mini popups asking if I want to "Chat with an expert" (once on SFF, twice on Politics).
Is this some new functionality of SE sites? Or a trojan I picked up somewhere?
Did it occur to you to check the date that this "expert chat" appeared? (Hint: Today is the first day of April.) I chatted with one and it's a bot - apparently based on an Eliza type program.