What about 10 years from now, it came out that some politician liked (or "engaged with) a bunch of racist videos when he was a kid?
There was certainly a fad when social media was new to get all worked up about finding out about something someone did in the past, where people were even losing their shit over something that would normally be innocuous like a photo of a teacher enjoying a beer at a party. But, I think we're kind of over it at this point. Fashion trends don't last forever.
You wouldn't have that problem. Try looking someone up these days in Google and you soon discover everything lives in walled in gardens like Facebook or instagram or iCloud or Snapchat or telegram.
But evidence starts disappearing. 20 bad articles about you in 5 years 10 might survive in 10 years maybe 2 might survive.