Don't worry to much. It's really not about people digging up embarrassing things about you, but about your attitude towards your old stuff. I did a lot of cringeworthy things, when I was trying to find out what I actually wanted to draw. NSFW stuff, SO MANY Sonic OCs, MLP... all of that. I also did a lot of RPs in forums and though you can't find them anymore, there are people around who know.
So... is that something to be embarrassed about? Maybe, but I try not to be. It's not my best work for sure, but I had immense fun doing these pictures back then. Doing fanart is still fun and I sometimes even go back and draw a pony, just because. While I grew out of these things for the most part, I just try to remember how great the times were. Not artistically, but I had fun, that's for sure.
So if someone were to dig them old Snic RPs up, I would just have a good laugh about silly old me and move on. Yeah, I was stupid back then, so what? Everyone was. 