Query: “In the search for intelligent life SETI should limit its search to star systems 100 light years or less?”
Response: In search of anything there should not be preconceived limits imposed a priori considering them important one way or the other?
query: “I would not be surprised if we are being visited from star systems within 100 years or less – I would however be amazed if the #exceeded say 1000 light years”
see thats about breaking of speed barrier by their physical movement. But no harm in knowing if they exist, irrespective of they can reach us or not.
Query: “Light barrier can’t be broken, How do they get here synch, Simple”
response: it can’t be as far as we know
query: “They colonized”