a) They won't use AI to fact check reports submitted when those reports stand to make them money.
b) They can't/wont use the dragnet for daily petty revenue enforcement because then people will complain about it and it'll get reigned in and they won't be able to use it for that and all the other things people don't want them using it for.
You could also have multiple references to validate via crowdscoring.
You can also find people who are bad actors to decentivize them from mass reporting.