We try to be as open as possible here, so I'm glad you asked.

4 Posts were deleted that were directly copied from a PDF available at the epa.gov website.  We have software that automatically detects spam and these messages were flagged.

We'd love to discuss the topics that were posted, but don't feel that it is ethical to wholesale copy the content of other sites.  You are free to link and comment on the material, or even quote, but the posts in question were not appropriately attributed to their original source.

Seems like a fair policy to us.  If anyone disagrees, we'd love to hear you out.