Good idea! I think as a solution I would run multiple instances and double, triple, or quadruple-verify the data from multiple instances that i run to make sure no one is feeding me fake data. If there are discrepancies I could average the data, or flag the value(s) with a confidence rating and fuzz the numbers to be safe
If an instance fakes too much data and doesn’t match what other instances are reporting I’ll quietly defederate or stay federated but program my system to ignore data from that instance as not to tip anyone off