Of course not everyone would agree with me that it is banal, but I have read a number of them I've seen linked here and there, including the above. I didn't find any of them particularly amusing. Nor did I like the artwork.

That's the least funny one I've seen yet, it's just some information that most people learn in school put to pictures. The kodiak bear pic however, is funny.

I'm sure 15 year old girls talk about zombie-creating parasites all the time. Everyone is bored of it ;)

The zombie thing is very cultural and limited in time, it may not be funny after the fashion is gone.