Is there such a thing as bad poetry?

Yes. I say yes. Oh, oui, si, ano.

Bad poetry happens accidentally--usually it is the result of being both overly earnest and overly poetic, along with being really melodramatic. This site does a lighthearted parody of this sort of writing (which there is scads of everywhere--if you are writing about your own broken heart or careworn soul, beware)--and reminds writers not-so-subtly that yes indeed, it is quite possible to go over the top and write something astonishingly bad.

I give you Bob's poetic surgery shack:

http://www.jsheard.co.uk/theshack/

enjoy!

Dani