occasionally, a yc company will post a job ad with comments enabled. i bet most of them regret it, because it is almost always unproductive. a thread will sprout up about how this company's industry is doomed. if the company is in stealth mode, most of the comments will be from busybodies trying to locate the company name or website. someone with a grievance with one of the founders will take this opportunity to dredge up old arguments. and so on.
this is why we can't have nice things.