If you need a high level of trust, you can use identity verification services like BlockScore. We see it used when the cost of fraud or misrepresentation is high enough to justify the cost and hurdle of participation. The hurdle being collecting the required information from trusted users. If you want to know more, see blockscore.com.

I have also seen others like Nextdoor use address for verification. If you have a locality-based service, that is a low-cost option that will likely also weed out bad actors because a credit card with valid billing address is required.