The government should be able to tell people they can’t harbor illegal aliens (yeah, novel concept, I know). Whether a citizen of a foreign country is allowed to live here legally is a decision the government should make based on the qualities of that individual foreigner, not on whether a citizen of the host country represents to the government that s/he is “genuinely in love with”,”’married’ to” or “planning to ‘marry’”, “planning to have/raise children with” the foreigner. None of these personal issues are any of government’s business, and needless to say, they are all things that can faked and/or changed. I’m sure lots of foreigners really do convince themselves they’re “in love with” a US or UK citizen, and then proceed to convince the US or UK citizen that the feeling is mutual, even when what’s really going on is that the foreigner is in love with dreams of living in the US or UK.