I don't have any problem with some one putting that in their profile. In fact I think they should put in their profile if that's how they feel!
It isn't my responsibility to satisfy anybody else's preferences, likewise they have no such responsibility to me. If you can't f-me because i don't meet some preference you have I would much prefer knowing that before hand! We have wasted a couple of evenings and expensive dinners on people who didn't state what they preferred! For one couple it was my soul patch and my ex Morman status that was too much for her to handle.... Well it would have been nice to know that you can't screw someone who had those characteristics before we met for dinner.
If you feel strongly enough about something that it is a deal breaker I think it should be in your profile. I am not going to take offense that you like this and don't like that! Seriously if you can't hop in the sack with me because of my weight, my height, my boob-size, penis length, skin color, facial/body hair, politics, religion, economic class, education, my spouse, my upbringing, etc., please let me know upfront so I don't waste my time meeting you. I appreciate those profiles that are clear about what they want and don't want. Swinging isn't a civil right, I'm not going to sue you for being discriminatory. in fact I think you have every right to be discriminatory. Although it isn't going to help you get laid, at least not by Mr and Mrs D&D.