Slippery slope is derived from tolerance of what is societal acceptable. Even with the slippery slope, in the U.S., the FCC still infringes on freedom of speech by controlling what can be said on Television and radio.

I agree with the slippery slope theory, it seems the problem is its all about ratings not entertainment. A film 'Network' (1976) by Paddy Chayefsky depicted the extremities and lengths that TV would resort to in order to maintain and grow ratings. It seems theres no limits to what we show on TV now-a-days. We used to have family programs or entertaining programs that suit, now we have programs on TV that show people eat insects, animals parts, etc. We have programs were we publicise personal domestic, family and marital issues for the world to see. It seems there is no shame it what we are prepared to put on our screens. What once was about entertainment is now about profit and ratings. So is there a slippery slope? Absolutely. As stated in the main we can see how the standards have fallen from the 1950's to now-a-days. My only worry is, were does it go from here? Whats next?

Of course there are certain exceptions to the slippery slope rule. However I don't believe that the example you gave was the best...

The thing to remember is that you cannot use the slippery slope argument as a rule. It does not apply to every concept, universally. It must be proven, or it is invalid.

It should be easy to prove that the slippery slope is slippery by its very nature. I mean, why else would we call it the slippery slope if it weren't slippery. But that proof is very slippery itself and many societies have slipped up due to the slippery slope and are thus no more. ;)