Is this billboard offensive?

[Sewer]

Here's the ironic part. The most vocal of these prudes has this as her profile photo:



Which is more offensive now; a billboard using prostitution humor, or a parody of something that encapsulates what amounts to the worse in the human suffering?

No. The difference is that the "Chairman Meow" poster is not there to advertise only to amuse. It also does not involve any real people like the model in the campaign. And finally (and most importantly) it's witty and has some originality and imagination to it (and I don't see how it is trivalizing the deaths of those under Mao), the billboard on the other hand...

Witty? It's a pun.