Looking for aliens in the electromagnetic spectrum must be one of the dumbest things humans spend money on. Take the disclosure project for example. How many sightings do you need to verify we have been visited for ages. There is more than enough multi-radar, visual, spectral and witness testimony to proof the case. Enough to settle a typical murder case.
After a century of humans communicating with electromagnetic waves we are about to enter the era of quantum communication. If within a 150 years civilizations transition through their EM communication phase what is the chance of detecting other civilizations with it? Being in the youngest part of the Milky way it is fair to assume there are more advanced alien civilizations in our vicinity than there are less developed ones. The fact that our visitors can't be bothered to speak to us as equals should give food for thought. But then we don't exactly chat up the ants in our gardens either.