Personally, I've decided that if somebody bases their opinion of of me off of an internet comment I made a couple of years ago- their opinion really isn't worth considering. So I've decided not to care about it.
Whatever stigma exists online with people who have the "incorrect" opinion- I haven't really seen reflected in real life.
The logbook of my opinions is actually really interesting for me to look back on. See how I've reevaluated some opinions, or take a critical look at older arguments that I hadn't considered recently. Of course- I do some sanitation as well, removing certain things that may have been particularly dumb.