i work with a ton of people that have danced that game before.

I can tell you with honesty that certain codes no matter what (especially today) will get you in hot water.

those are basically marriott employee codes, govt codes, and stuff like AAA.

If you use any of those - be ready to defend it with legitimacy or pay the rack rate and be flagged going forward.

i've had friends and co-workers try for the wrong code and get in deep!