you einsteins could not report an errant fart to the IRS lest a tax evader...
LOL, probably correct.
In addition, US tax laws are quite useful vis-a-vis foreign earned income, all you need is a very good CPA to carefully prepare your tax return every year and use the system to its best advantage.
Been doing this for over thirty five years...and counting.
It is generally those that are not familiar with the internal revenue code that usually **** up.
Also, those perhaps considering slipping the IRS information about a particular individual, open themselves up to a rather detailed audit, if they are US citizens.
Which brings us back to original quote...
you einsteins could not report an errant fart to the IRS lest a tax evader...