But that's the problem, isn't it?
What's funny to you might be offensive to others. And what's offensive to you might be funny to others. I don't find jokes about a murdered child funny either, though I suppose for the sake of accuracy, it's worth pointing out that Madeleine is missing, and "murdered" is supposition, albeit very probably a correct one.
But whatever the subject, there's going to be a point where what's funny to some is offensive to others. And both Ross and Brand ARE offensive, in many ways, to many people.
The fact that they are, in your opinion, "old" doesn't make what they do any less offensive to them, does it? Or are you suggesting that because it's offensive to older people but funny to you, well, that's all right then, because older people just don't have a fully developed or up to date sense of humour?
If we could find someone that found Maddy jokes funny, then he could claim the same.
That's why broadcasters have standards, both imposed internally by the likes of BBC editorial policy, and by laws.
And Brand and Ross, at the very least, broke the BBC internal standards by a LONG way, and perhaps, broke the law too.
There's always been a line between "edgy" and offensive. No broadcaster can seriously hope to operate if they are going to guarantee never to offend anyone. So "edgy" is legit, providing it stays within all the relevant mandated standards. But if you go beyond those standards in the search for edginess, be prepared for a blowback. And if you go as far beyond them as these two muppets, be prepared for that blowback to be a hurricane.
If 30,000, or whatever the figure is now, saw fit to complain to the BBC, and more yet to Ofcom, the one thing you can be sure of is that those that actually found it offensive will be a LOT more than that, simply because apathy prevents most people from bothering to complain, even if they were offended.