Having said that, there are also plenty of humans who enjoy hunting so we could easily get screwed over by some trigger happy alien dentist.

Holy sh*t you could be right. It would be somewhat rudimentary but you could use them in a similar way to fibre optic. For instance, at a pulsar with an emission cone pointing at the recipient, you could have a satellite in a polar orbit. The satellite would be flat but large, like a disk and could be rotated so that…

Maybe that’s what we need to do, we just broadcast our current understanding of, say, quantum mechanics, and we will get a rapid response from an disgruntled civilisation saying something like “No stupid! That’s not how quantum mechanics works, its like this.... God, how dumb can you be?”

I can’t say I agree with that logic. If they had the capability to destroy us, then they would have to be significantly more advanced than us. If we had the same attitude, would we go around deliberately killing off apes and dolphins purely because we were worried, given enough time, that they would evolve and destroy…