Because they can't understand or detect my method of communication. We listen with radio waves. If they knew how to send signals faster than C, that would certainly be more attractive than C-limited radio. It is easier to learn about a hostile, perverted civilization like us by just idly watching. Ask a sociologist.
Speculation is good, but to claim it is fact is simply arrogance.
Not that any of you have, I'm just saying don't let it get that far. I am building a bigger model, with a noninductive winding. In other words, it becomes possible to 'tap out morse' at superluminal. I and another scientist on the internet are working on a cordless version of this. It uses an antenna mad of a special material to send the signal.