Find them with radar in the Med. Sink their smuggling boats. rescue the survivors. Dump them in Libya. See how many smugglers or invaders want to keep trying.
that’s what I say : give notice , invasive illegal shipping WILL BE SUNK , and then start sinking them . Day & night .
It is NOT heartless to challenge and confront invasions .
They do not come bearing guns , they come bearing reproductive organs . In the long run , that’s far worse .