Enforcement is lax at best anyway (though I do believe a ridiculously large service area can have negatve ranking impact). Once a client accidentally created a trans-Atlantic service area due to homonyms and it was SUCH a hassle to actually get rid of it (the thread is somewhere on the forum).
We have clients constantly putting bonkers service areas on their profiles, and I believe the only time we've ever had true issues from support was during direct calls for validation or revalidation process. The suspensions/revalidation were triggered by other issues, I should add.