UNICOMs can be approved without any training or qualification of the operators except for a radio operator certificate.
Ive run one, also flown into some very good ones but also seen some real shockers. Such as a certain SW airport where the ground operator thought he had some ATC authority and directed a GA aircraft to hold to the south to let a larger RPT or charter in.
Or another one who used to like to use the term "clear to land".
then another operator who didn't understand how to interpret a windsock and gave a pilot completely wrong information about which rwy the wind was favouring.