I get what you're saying.
1. The internet never forgets.
2. The internet never forgives.
3. Anything you post online can eventually be used against you.
The thing is, I grew up being ostracized and bullied without the internet. Even if I kept silent and minded my own business, if somebody wanted an excuse to pick on me they'd just make one up. Haters gonna hate.
People are going to do as they please regardless of your efforts to avoid giving offense. I don't see any point to living in fear of the self-righteous and perpetually indignant.
Somebody once asked me why my domain name is the name on my driver's license. I told them that if I didn't claim it, somebody who had a beef with me could and might use it to smear me. Do I use it to post shit that might offend people? Yes. But if you can't deal with me because you were offended by something I wrote on my own website without forcing into other people's spaces, then you don't fucking deserve my presence in your life.