There were definitely some interactions but of course Eichmann tried to keep social activities to a minimum just so much that he didn't give rise to any suspicion.

I assume that people don't want to talk to reporters because of the bad image cast on them. I mean having a mass murderer in your community and not identifying him people may think that you're either dumb or you were actively ignoring it. After the war people mostly tried to forget about the Nazis as a coping mechanism for their common guilt.