I haven't actually deleted any of these comments. Reddit, for its own inscrutable reasons, has decided to censor my account. Whenever anyone tries to view my comments (either in context or from my profile), Reddit says they've been deleted. When I'm logged in, though, they all show up. In other words Reddit is going out of it's way to deceive me into thinking my comments are viewable to other users when they aren't. I wasted over a month regularly "contributing" to Reddit before uncovering the deception.