While an entertaining thought, in practice that would be ridiculous as that lawyer would then be subject to EU taxation which would negate any advantages for acquiring EU residence. That lawyer would then also be subject to US taxes as well since the US taxes worldwide income regardless of country of residence, while most EU countries tax income earned while a resident of that country. Despite tax treaties, some taxes, such as Social Charges in France, aren't covered by treaties, thus subjecting that lawyer to an entirely new world of pain in terms of taxes. Not to mention that if that lawyer were practicing law in the EU, he'd have to get credentialed in the EU or face arrest for the illegal practice of law.

What is the sanction if you have no physical presence in Europe?

No, this is completely incorrect.