With luck, sh!tting yourself openly will be seen as a gracious salutation by their species.
I agree its almost certain there is life in the universe besides our own. But will they ever be able to travel to us, or us travel to them? I dont think so.
Trouble is, as you say, a question of distance. Our nearest Star is 4.2 Light years away...not a drop in the Ocean, by any means.
However. We do not know, that there isn't something that is faster than the speed of light. Also, we only say that we couldn't visit them, because at the moment, we cannot achieve even close to the speed of light, with anything larger than a particle.
That does not mean, that they cannot.
We also, rightly, believe that the frail human body, could not withstand anything close to light speed and we don't have a reliable system of "FREEZING" people, in order to make this more plausible, and the journey less tedious.
That does not mean, that their bodies cant, or that they cannot "freeze" and unfreeze bodies at will.
So. Once you open up to that possibility, that another species, can achieve occupied space travel at close to or beyond our perception of the speed of light, then 4.2 Light years, isn't so far.
It may sound Geeky, though that is not the intention and I am by no means all "Comic Book Guy" about it, but...Star Gate...the film and subsequent SG1 series, does throw a very different possibility into the frame, assuming we ignore the tripe that is Atlantis.
In reality...there is only one man alive, who has even a "clued up" understanding of the universe and that is Prof. Hawking. So if a man like him, at I would imagine his own admission, knows what is only the tip of a potentially infinite Iceberg...how can we really, disbelieve anything, that has not already been proven to within the limits of our understanding?
You just cannot possibly attempt to fathom, what is REALLY possible or impossible. Can you?