Uncontacted People

The recent death of the last speaker of Bo in the news prodded me to the Wikipedia entry on uncontacted people.  All sorts of interesting folks there, but particularly so are the Sentinelese, who are estimated to be the most isolated group on earth.  (There may be even more remote groups, but they're so hidden that they don't have a Wikipedia page.  Now that would be isolated.)  Even attempts to contact the Sentinelese reflect the extremes to which researchers must go:

The Sentinelese are actively hostile to unknown intruders, requiring frequent shows of peaceful intent before allowing outsiders to come into arrow range. Attempts to leave them material goods from the late 1960s have resulted in household ware and metal objects being utilized, coconuts being eaten but not planted, pigs are not eaten but shot and buried, as was a doll. Red buckets were taken with apparent delight, while green ones were rejected.

Reminds me of some libertarian friends.  Except that instead of coconuts and red buckets, beer and ammunition are the traditional calling card gifts.  But I digress.  Anyway, if it's so damned hard to talk to other H. Sapiens who have been isolated for a mere 60,000 years, what are the chances that we'll ever be able to have a sit-down chat with any kind of E.T.?  There's a sci-fi story in there somewhere.