Maybe we shouldn't be so quick to judge, as all circumstances are different. I chat regularly to a lovely man whose wife is disabled. He is her main carer and he was very lonely. Largefriends is his lifeline.
If I had disregarded his profile because he was married, I would never have got to know this man, who has become a very good friend.
I agree, if the profile states that they are married and looking for 'a bit on the side', then it is a little different.
But sometimes, it's worth hearing the whole story