Yeah... if the drone were to fail and lead to an accident, then you'd be liable. Also, not all drones have an automatic tracking feature, and some people have been known to "drone and drive" which is incredibly foolish. Other than that, I'm not sure what other risks there may be.
Per the FAA:
What are the safety guidelines for sUAS recreational users?
Follow community-based safety guidelines, as developed by organizations such as the Academy of Model Aeronautics (AMA).
Fly no higher than 400 feet and remain below any surrounding obstacles when possible.
Keep your sUAS in eyesight at all times, and use an observer to assist if needed.
Remain well clear of and do not interfere with manned aircraft operations, and you must see and avoid other aircraft and obstacles at all times.
Do not intentionally fly over unprotected persons or moving vehicles, and remain at least 25 feet away from individuals and vulnerable property.
Contact the airport and control tower before flying within five miles of an airport or heliport. (Read about best practices here)
Do not fly in adverse weather conditions such as in high winds or reduced visibility.
Do not fly under the influence of alcohol or drugs.
Ensure the operating environment is safe and that the operator is competent and proficient in the operation of the sUAS.
Do not fly near or over sensitive infrastructure or property such as power stations, water treatment facilities, correctional facilities, heavily traveled roadways, government facilities, etc.
Check and follow all local laws and ordinances before flying over private property.
Do not conduct surveillance or photograph persons in areas where there is an expectation of privacy without the individual's permission (see AMA's privacy policy).
