Ask, I guess. The people doing the communicating are perhaps committing fraud and endangering their own wealth and freedom if they lie. I'm willing to bet the SEC has regulations that apply to this situation already.

If three large shareholders came in with a similar agenda but did not disclose group status, the SEC would investigate. First, the SEC would request that they turn over communications records. 99.9% of the time, they would. If they didn’t, the SEC would seek a warrant.