I do not think that there are a lot of people her who advocate being disrespectful of their spouses.
I actually like to think that SwingersBoard is a place that helps people to understand that it's not all about their own selfish pleasure, that couples are in the lifestyle together, and that communication, respect, and love are at the heart of a successful lifestyle adventure for a couple.
Like Lionheart72, I fear that your impression may be skewed by seeing the posts specifically in forums where people come to discuss problems they're having. I think one refrain you may hear in those forums is that there is great value in trying to do the right thing by your SO. We should, of course, make every effort to avoid hurting each other, and toward being respectful and sensitive to each other. And I think you will read of people advocating this approach over and over throughout the forums.
But another point you may see made from time to time is that we must, as fallible human beings, admit that sometimes mistakes do happen. Often, they are not intentional, premeditated breaches on the part of the offending spouse; rather, they are the result of the basic biological fact that a person's rational thought process is often not working at peak efficiency when they're in the throes of sexual arousal. This is not an excuse for ill-advised behavior, nor is it an endorsement of it. It is simply an acknowledgment that it happens sometimes, despite our best efforts to prevent it. Speaking for myself, I encourage people facing this situation to consider whether they have a good reason to trust in the basic goodness of their spouse, talk it over, explain the hurt feelings, understand the thinking of the offending partner, come to a mutual understanding of what happened, how things went wrong, and how to avoid a repeat-performance of the problem.
I hope you can see that this is not in any way advocating for people to be disrespectful or hurtful. It is an attempt to help people to recover in a healthy way from a bad incident.