I was a bit skeptical, but a friend of mine who is a ham radio operator in Boston confirms the radio frequencies posted are unencrypted and are indeed being used as stated, and the photographs of unprotected facilities speak for themselves. The descriptions in the report are a bit breathless, but they appear to be essentially plausible.
It seems that Potemkin Security is everywhere -- even at a national political convention. We're willing to shut down all the highways in Boston, but no one will even think to properly install fencing or to encrypt security communications.