Completely agree.
Apply the Theory of The Perfect Husband: "Listen, but *never* speak."
Chances are extremely thin that the tower will ever want you to say a word on the radio. Unless you are an appropriately licensed pilot and operating a registered aircraft (one that has an "N" number), it is not legal for you to transmit on any aeronautical frequency. Even having a Restricted Radio Telephone Permit won't get you past that requirement.
Aviation frequencies are for appropriately licensed pilots flying registered aircraft *ONLY*, and there are very, very, few exceptions.
Agreed. Ground coordination of air assets during emergency operations is one of the few exceptions that I can think of, but not applicable to UAV flights.