From Boot by Daniel Da Cruz:

On the other hand, recruits are shocked to discover that their drill instructors (D.I.s), though obviously subsisting on a diet of rusty nails and stove lids, are never - at least hardly ever - profane.

Their speech abounds in "gol-darns," "doggones," "freaking" and other circumlocutions. Gone are the non-stop blistering four-letter word-strings of yesteryear. In today's Marine Corps, drill instructors and officers, however much they swear among themselves - and it is not a lost art - are strictly prohibited from using profane, obscene, ethnically or racially degrading language to, or in the presence of, a recruit. The recruit, incidentally, may be addressed only by his last name, the billet he occupies, or as "recruit" or "private. "

Indeed, as early as the second day, the drill instructor asks the assembled platoon:

"Since you've come aboard, has anybody verbally abused you-called you an s.o.b., or a slimebag, or a maggot or faggot, or addressed you in any other degrading terms? If you were singled out, and a remark made about your race, color, religion or national origin-that's abuse. Well?"

Silence.

"Has anybody abused you physically-hit, pushed, shoved, slapped, kicked, beat, tripped, kneed, elbowed or punched you?"

Silence.

"Very well. If you feel you were abused, physically or verbally, you are to inform your Senior Drill Instructor at once."

Allegations of abuse are handled with dispatch. The accused drill instructor is relieved of duty immediately, while statements are obtained from principals and witnesses. D.I.s found guilty of abuse are subject to fine, demotion, or transfer to other duty.