A community where you post an idea for a product or service and comment unfavorable aspects of it in the comments one after another, to a ridiculous extent that doesn't stop.

The objective is to add as many undesirable features that come with the product, .ultimately making it actually a terrible end product and defeating its original purpose.

Example:

Post: A waterproof toaster oven.

Comment: That emits radiation every time it's turned on.

You can either add to the first comment, making what they said even worse. Or you can comment your own.

The objective is to keep going until you can't think of anything else shitty about the idea to add.