Anyone can detect any transmitted radio signals. The ARRL books explain how. I’m too lazy to go look at my copy to photograph the section of the physical book in my room. The frequency licensing is totally irrelevant here. That will just be changed and noise will get broadcast over the band. If you keep trying to transmit, someone will find you. You are literally creating a beacon in all directions that points at you. Everyone will be listening, but one by one there will be no one to listen to. This is standard stuff. Every military unit has radio counter measures. You are very limited in real output power already. The big boys will blow you away because they have no such restrictions. It is one of the reasons why there are power limits. Now if you can hide something useful and encrypted near the noise floor, that is one real possibility, but in this age of software defined radio, you are still going to get caught.