Like it or not, the Internet is today’s store of record for a significant proportion—if not the majority—of the world’s activities.
If you don’t want your bad behavior preserved for the historical record, perhaps a better answer is to not engage in bad behavior instead of relying on some sort of historical eraser.
That's a risk we all take. Not that long ago, homophobia was the norm. Being on the wrong side of history can be uncomfortable, but people do forgive when given the right context.