Infidelity on demand or Matt 5 27-30

An item on the Today programme alerted me to the presence of websites for those who married who would like an affair.  Apparently 30% of people going to singles dating sites are actually married.  A quick Google search shows numerous sites offering this type of service

The protagonist was very honest, he was doing it for financial gain.  The earnest lady opposing was doing a very good job of defending the institution of marriage.  But that was the level of the debate, marriage is worth preserving, it needs working at.  The website guaranteed anonymity, apparently digital evidence often leads to a partner discovering infidelity.

It needn't lead to actual sex apparently it could just be Cybersex...so that’s OK then. 

Well not actually.  Christ' teaching that even to contemplate murder or adultery in ones heart is tantamount to the act itself in God's eyes.  His standards are rather high.  Nobody on the programme said such a site was fundamentally wrong. It is an example, if I read the text correctly, of an arm that needs cutting off or an eye that needs plucking out.  I can do that as an individual by not visiting these sites but what does God think of a society that condones rather that condemns such sites?  Are we afraid to speak out?  Have we become so individualistic that we don't think we are judged as a society?