Last puzzle: RIP Puzzling! (#1)
So, you turn off dark mode, and things seem normal at first, but then you see a message at the bottom in red that looked something like this...
Hahaaaha! What are you going to do now?
You write it in paper, and you say, "Sure, I'm going to figure out what you're planning!"
But then you realize that something, something weird was happening to Stack Overflow. All the questions disappeared, then the answers, then the HNQ, until everything disappeared. All that was left was the same message that you saw when you turned off dark mode.
Bad luck then takes over, and your computer freezes. You restart it frantically and went to the site again. Same note. You went to the sites he was going to kill. Same note.
Maybe the bolds and italics?
The message is the key