We were on vacation and out of our local area so we changed our profile to reflect our location. We had set up a date with a couple while in town and were subsequently contacted by a single male who was interested in meeting us. (We always get a lot of looks and contact while traveling) Anyway, when we told him we weren't interested he fired back with a reference to us being "Trump lovers" or some such racial crap. Obviously this individual concluded that we weren't interested because of his race due to our negative response to his email.
Otherwise we have had more than our fair share of single guys who message us with "I want to bang her so bad" and other things along those lines. Do they really think that will pique our interest and make us want to invite him to join us? Surprisingly none of those folks were certified. (sarcasm)
We don't block folks in cases like that unless they persist.