The One Thing I'v Learned, Don't Believe Everything I Hear Online

Have your parents told you not to believe everything you hear on the internet?
I'm in a bunch of fandoms. I've noticed that someone I follow (or a post that showed up in my feed) will claim a certain person is problematic. However, they do not provide any receipts to show what they saw/heard. other times their posts are so vague that people in their mentions don't know who to be mad at and what they did. when people ask who are they mad at and what the person did, no response.

This isn't about defending someone problematic. Maybe they are. Maybe they aren't. You don't find it suspicious at all when everyone and their dog is saying "So and so did this" And everyone talking about it isn't showing proof and when you ask no one is responding. It's not about defending someone problematic. If you're

vague to the point no one knows who to be mad at and why
-providing no proof and/or ghosting people asking for proof
-everyone and their dog is saying "This person is racist" yet isn't showing you where/how they got the info.
-Their ONLY proof is "they liked a tweet" "they follow this person" "they reposted that"
You lose credibility, people WILL assume you're lying. If you had nothing to hide, you'd just outright tell us what the person did and provide a video, tweet, etc of what they said.