Answer:
two ideas
Step-by-step explanation:
1. if it's someone you're not close to I wouldn't get involved. Although I'm assuming since you are asking random people on the internet, you do know this person lol.
2. If its genuinely for no reason, report him, he cant really do that. Unfortunately, they usually have some reason even if it's not true. So thats a toughie. Hope you figure it out :/