I suspect (with few facts available as yet) that life signatures will turn out to be common... (ish). It still, to me, seems to be a simple matter of risk mitigation... if you can avoid a risk (especially a potentially disastrous one) at no, or relatively low, cost, then do so.
Yes.... to me its a shame that they don't step back and ask..., 'But have I the right to speak for all of earth?' Or try imagining the consequences if it all goes pear shaped.I also have no doubt that private projects can and will exist and that these would be uneffected. The desire for 'contact' is very very strong, for some people.
I've never really worked out if I am a pessimist or an optimist.... perhaps a realist. Things _could_ be worse. Lets not go out of our way to make it so.I feel things can't possibly get much worse, so the risk is favorable in my eyes. I am also not too concerned about the chance that any intelligence that bothers to seek us out would be hostile. There are some rather good arguements that could be made against such a thing.
Agreed... again an unlikely event... but worth trying for.One thing I can agree on, we definitely need to begin thinking as a species. ...
Who knows if that will ever happen however.
So my summary: The risk is low. There is at least a fifty-fifty that we would benefit from contact. Consequences could take a few hundred years to materialise. Is is very simple to avoid the risk.... just don't shout. No one person can decide to place a bet with the future of all humanity.
I think all of that is self-evident and leads to only one conclusion... don't shout out till you know who is there. And a corollary: Look as hard as you can... the benefits could be enormous.