The social-media platform Reddit is making its stock-market debut Thursday and is offering a chunk of shares in its initial public offering to users, who are the lifeblood of its operations. But those same passionate users could cause trouble for the company. WSJ's Corrie Driebusch explains, and a moderator for the popular Reddit forum WallStreetBets weighs in. Further Reading: - Reddit Fueled Meme-Stock Mania. Now Its CEO Is Overseeing His Own Company’s IPO.  - They’re Reddit Die-Hards. Do They Want to Be Shareholders, Too?  - Reddit Eyes Valuation of Up to $6.5 Billion in IPO  Further Listening: - ‘To the Moon’  - An Oral History of WallStreetBets  Learn more about your ad choices. Visit megaphone.fm/adchoices