Yesterday I heard some congressman suggest that we implant some sort of
"chip" into peolpe who enter the country under the proposed "guest
worker" program or on student visas.

Cool, as long as we can get one implanted in that same congressman to find
out which lobbyist he's taking money from, or which corporately subsidized
private jet he's using. If it's such a great idea then let's be sure THEY
submit to it first.