The regs require two things, relative to this issue. One, that you accept interference and two, that you do not intentionally interfere with another stations as evidenced below. The point in the regs is that YOU are responsible, not the other guy. Of course, it applies to him in the same way. Kinda stops finger pointing by aiming all the fingers back at YOU.

[Code of Federal Regulations]
[Title 47, Volume 5, Parts 80 to End]
[Revised as of October 1, 2000]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR95.212]

[Page 530-531]

TITLE 47--TELECOMMUNICATION

COMMISSION (CONTINUED)

PART 95--PERSONAL RADIO SERVICES--Table of Contents

Subpart C--Radio Control (R/C) Radio Service

Sec. 95.212 (R/C Rule 12) What communications are prohibited?

You must not use an R/C station--
(a) In connection with any activity which is against federal, state
or local law;
(b) To transmit any message other than for operation of devices at
remote locations (no voice, telegraphy, etc.);
(c) To intentionally interfere with another station's transmissions;

[[Page 531]]

(d) To operate another R/C transmitter by remote control (See R/C
Rule 17, Sec. 95.217); or
(e) To transmit two-way communications.
(f) To transmit data. Tone or other signal encoding, however, is not
considered to be data when only used either for the purpose of
identifying the specific device among multiple devices that the operator
intends to turn on/off, or the specific sensor among multiple sensors
intended to turn on/off indicating device for the operator.

[48 FR 24890, June 3, 1983, as amended at 54 FR 8336, Feb. 28, 1989; 54
FR 20476, May 11, 1989]