"I represent the holders of the patents in question" is simple enough. I wonder if it's fraud, if all you're putting out is an unverifiable claim on the net. The pool operators do that all the time.
It’s like someone selling a deed to land they don’t own, or leasing a property they don’t own to a tenant.
Few people will even bother to try, and if so, you keep them at a distance with some random bullshit (communication can break down _sooo_ easily), but it certainly poisons the well by adding a layer of FUD to the tech you're targeting with your claims.
Standard fare of patent pool operators, and it's high time to reciprocate.