The truth could be far far worse than we could ever imagine. What if this guy has got it right?

I am not saying ALL aliens are flesh-eating and need to be feared, but SOME might be and yet we have no concept of anything other than our normal flora and fauna on Earth. Something SO weird is totally off our radar.
Just because a civilisation is advanced does not mean it is friendly or looks like us or acts like us. So far the PTB have not addressed that issue but are happy to get us used to the idea that aliens exist with us here on Earth. The next thing which they might need to hide is - what are the alien agendas and are they friendly?
The other thing is - how will we communicate with any alien? This is a big deal because if you cannot communicate in their language, then you will not know what they are saying and each conversation has to go through a 3rd party (one of theirs) You dont know what is being left out.
I think we should spend money trying to develop communication/translation technology so that we can start by using technology communicating with other races and species here on Earth. Translation software is pretty useless at the moment until realtime translations are possible and that means some heavy computer power.