Why HDR (sometimes) sucks

I cannot believe this my first post about a technical fotography aspect in 3 years.
For some time now, I see there a lot of these HDR pictures on the web like on flickr for instance.
I am sure most of you know how these High Dynamic Range images are made and how they look. In case you don't, here's a short introduction:
At first you take several pictures of the same motive but with different "exposure" settings.

Then you transfer your pictures to your computer. The rendering software then produces a high dynamic range image.


As you can see, in this example (taken from the English Wikipedia) the results can be stunning. Especially when the lighting makes good results almost impossible.

OK, but there are MAAAANY "bad" examples...

or
Don't get me wrong. There are some really nice and impressive HDR images out there but lately I've mostly seen pictures like the two examples above. Let's hope some people stop exaggerating ;-)