Remaining anonymous on the internet can feel like the ultimate protection. Without any risk of identification, you can share thoughts or secrets that you wouldn't dare say out loud. Last month, we came across an /r/AskReddit thread dedicated to this very idea.It asked users, "What is something you won't tell your friends or family, but you will tell Reddit?" As expected, users took this opportunity to open up about their most personal issues.While some are slightly embarrassing and even funny ("I once sat through an entire movie without realizing that I had left my car running in the parking lot."), others are deeply serious ("I am no longer certain of my faith."). Regardless, these confessions reflect what the people who posted them hold dear, and which parts of their lives they wish to keep private.As much as we can learn about these Reddit users from their deep, dark secrets, we'll never actually know them, but, like we said, that seems to be the point.Click through to read 30 deep, dark secrets from Reddit. Promise to keep them?