Does this give them the right to do this?/what should be done

Has anyone ever been accused of something they didn’t do? If you hear someone did something would you automatically believe it or question it/ask the person being accused/ignore it? I’ve been accused of things a few times and a few other people I know too and it always came back negative as in I and them didn’t do what we were accused of. Yet years later people still talk about it as if it’s true, I’ve also had people tell other people to avoid me and harass me and other people I knew due to it. The harassment lasted about 8 years now since I was under 18. The harassment includes since I was under and over 18 people being told not to associate with me, whenever I would make a new friend they would get them to stop liking me, of someone has an interest in me they wouldn’t want to be with me, being followed around, people calling my house non stop, multiple requests and adds on social media, people saying things to my family members they shouldn’t be saying, these 2 girls one my age and another was an adult made a whole page talking about me and a few other people I knew (kind of like a hate/gossip page), the adults tried to get me removed from school, almost dropped out, considered changing my social media and phone number, I’ve even had people drive by my house multiple times. It’s so tiring to deal with considering it’s been 8 years of harassment not just by people my age but also by adults and groups online and offline.

FYI I was mostly under 18 when all this happened. One incident was when my family member committed suicide and adults online wanted to spread gossip about it changing the story to he was murdered and put my address in it and a few other things.