A Psychological "Prank"

Instead of sleeping last night, I thought about a psychological "prank" which would be really fun to do.
First, you'd need a victim and an insider. Message your victim anonymously and start a conversation, but plan everything out beforehand in case the person asks questions regarding you messaging them. Keep the conversation going for a few days or weeks, depending on the scale you want this to be. Then the insider's knowledge comes in. Gather some personal information, such as whether the person has any pets or anything the average person wouldn't know. Now the most exciting thing you'll do on your part, confronting the person. Start off by saying something like "Could you answer a simple question? I haven't been doing well emotionally recently. It's been a really bad month for me, and I'd like you to help me out with something. Do you sometimes feel like you're talking to someone you know, [insert name, assuming the person didn't give it away before]?" and wait for a response. Stay anonymous. Give answers that include some personal information, something like "Before you continue, did you feed [insert pet's name] today?" would do the trick. Next, ask them if they'd like to know who you are. The answer will be yes. Then comes the psychological part of the prank. Say "I will tell you if you come up to me in real life, but on one condition. You have to say [insert something weird and really uncomfortable to say, like "I'm gay"] and be quiet until you get a response." and then wish the person good luck with a winking face. From then on, say nothing. The victim will be in a really hard situation. It could drive them insane, and that's the point. They'd either have to live with the fact that someone knows so much about them in a creepy way or take the risk of saying something uncomfortable to other people, hoping to find the right person out of the many, many options.