Dear All,
What the human mind has difficulty in grasping is that space is absolute infinity. Our Galaxy, our Universe, this tiny bit of unlimitedness, is simply just a part of an infinite limitless number of others. There is no number because there isn't a number... no such number exist......... simples!!!
As to communications, there are all sorts of things floating about the radio spectrum that radio telescopes 'hear', but the chances of our hearing amongst it all what we perceive as communications are very very very remote. In saying this, I mean that 'others' will most likely use entirely different transmission methods that we have no idea of because we haven't advanced enough technologically enough to receive/recognise them.
As to our being watched from the timeless void of space... well, who knows... but I bet we are................
To put it in a nutshell, humankind would be best concentrating and occupying itself on not knocking six bells out of each other, and concentrate on more important things. All else will/would happen in good time.
Regards, Bernard