As all the tech sites are giddily running free publicity for the world's largest online retailer today, I'd like you to consider these two pieces about why you can't trust Amazon as a seller:

• The latest episode of the podcast Reply All offers a fascinating look at why "Amazon has suddenly gotten a lot sketchier."

• The New York Times examines the "Curious Case of the $2,630.52 Used Paperback."

Imagine your favorite grocery store allowed an unregulated retailer to start selling sketchily sourced knock-offs in their aisles. How would you feel about that?

And more importantly, Amazon warehouse workers around Europe are striking right now. You don't want to cross picket lines, do you? I didn't think so.