Of course, it's obvious that calls can annoy and jeopardize relationships... but as far as calls voiding a signed CONTRACT, I don't buy that for a second. If that's the case, then it was a handshake and not a real contract in the first place.
It appears that Dwight is attempting to lay the groundwork for "shareholder blame" when deals fall through, which they already have according to your earlier post.
An Investor Relations firm is in business to relate to Investors.
The deal was signed and sealed, soon to be delivered (the goods that is). I seriosly doubt there was a claus in the contract saying that they can cancel it if a bunch of idiots call to ask questions about the quality of the concrete. Come on now, let's get real.