It's complaint-based enforcement, so it might seem sporadic or unfair, but they are not trying to offend anyone or deal unfairly with anyone. They aspire to be 100% unbiased and even-handed, but that's an ideal, not a reality, regardless of who you are.

You'll look back on this in a few weeks and laugh about how you could get so angry over the use of derogatory terms like watermelons, winnebagos, stax or jugs. A good sense of humor (and some tolerance for the shortcomings of others) may help a great deal. If Don Quixote had either, then maybe Cervantes wouldn't have been forced to write his novel about it.