Do American Citizens hide out as legalized, illegal aliens in California?

These 'citizenship' renounchers are not living abroad. They go abroad, change citizenship, then travel back to California, become legal illegal citizens in California, then go right back home, generally back east. In fact, I think you can do it online these days.

Living Abroad: More Americans living outside the U.S. gave up their citizenship in the first quarter of 2015 than ever before, according to data released Thursday by the IRS.
The 1,335 expatriations topped the previous record by 18 percent, according to data compiled by Bloomberg. Those Americans are driven to turn in their passports in part because of laws that have expanded bank reporting and tax compliance requirements for expatriates.

I propose two rules for citizens.
1) You are the citizen of the place you are at.
2) All citizens must vote in person.