I feel the safest way to use Reddit is to create a new account for every subreddit/community/subculture that is in any way tied to real life, and absolutely minimize the amount of information you give out in each one by keeping it relevant to that particular topic.

If you have some niche gaming/entertainment/etc interests, use an account specifically for those without ever delving into personal details.

Have a separate account for BPT, where again, you minimize sharing personal details.

If you have a hobby that has more real life interaction (for instance is location based, or is small and you use personally identifiable information), use a separate account and minimize sharing anything not related to the topics.

Obviously if reddit gets hacked/info is leaked good luck, but controlling available information about yourself seems increasingly mandatory to protect yourself from the crazies if you want to participate in online discussions.