I find this fascinating and could make for good conversations.
It's strange the only evidence I recall is the famous 'wow' signal. Even NASA produced more evidence without even trying.The video below expresses some of the thoughts from the father of SETI, Frank Drake and Co-founder of the SETI Institute and TED Prize winner, Jill Tarter about why the search of the cosmos is vitally important - in some surprising ways.
SETI is still operating and so is the Allen array.
After many years in operation not much evidence has come forward. The people doing the science seem authentic enough and passionate but there are a few questions that come to mind.
-why haven't they used other methods of information gathering?
-would they be allowed to share the evidence if they acquired it?