I wouldn't do or say anything @wasntsuchasweetsixteen
If I met someone and they became a friend or 'friendly acquaintance' and they started slagging someone off who did something 'wrong' 25 years ago, I would think ill of THEM, and not the person who did the 'bad' thing as a teenager/younger person.
Over a decade ago, I knew a woman (in the area I used to live,) called Carol, and she seemed OK for the 7 to 10 times I had spoken to her. Then this woman moved in a few doors from me, called Becky, and Carol instantly told me she was a 'fucking weirdo' who had fired a hate campaign at her ex's new girlfriend Charlotte, making up lies about her, and trying to get her the sack.
Becky was apparently reported to the police by Charlotte, and was arrested and given a 6 month suspended prison sentence for harassment (and a couple of other things, like breaching the peace or something.)
It had happened FIFTEEN YEARS before, and yet this woman Carol dragged it back up the first time she saw Becky.
Becky seemed lovely, and chatty and friendly, and had done wrong and paid her dues, and I thought it was very unkind of Carol to drag it up, and tell the neighbourhood. Fortunately, most people didn't give a shit about Becky's past, and just thought Carol was a nasty cow.
So I wouldn't worry, as anyone bitching and gossiping about you, about something you did 25 years ago, is going to look like an arsehole, not you.