There is something to be said about how in the US it's often best not to contact regulators at all, and to simply fly under the radar for as long as possible. That said, this guy is seriously toxic. Just by responding to his emails in a friendly manner can get you named in a lawsuit... and to blame competitors instead of regulators... Seems like someone to be avoided at all costs.
Makes me wonder, if had he operated under the radar for a while, and gradually complied with newly imposed regulations, things would be ok. Even if he got a massive fine, that'd be good publicity, and he must be spending a ton on lawyers anyway.