This type of humour is always available to those who seek it out and like it. I suspect few would change this.

But, what has changed is the Ali G (and Borat) type humour is now considered main stream, right there in the face of everyone, including those who consider it offensive and the young.

It certainly tells us that there is a big change in the direction of what is interpreted as community values and what is broadly acceptable. I suspect there will be a backlash at some point. Imus may be a sign of a correction of this interpretation in the near future..