If it makes you feel better, just know that your data will be under such piles and piles of garbage and useless data the more the time goes on. Unless youve done something HORRIBLE wrong or evil, you dont need to be afraid of being dug up.

Also a tip if you ever make a new reddit account - get in the habit of deleting your comments/posts after youve gotten what you needed. I always delete my comments after ive gotten a response or my post when ive gotten what i wanted out of it.
The max time they stay up is a day(unless i forget,oopsies), i usually delete them within few hours. No1 really archives stuff all the time so frequently so the time someone decides to do it youve already deleted your shit off of it.