So this discussion doesn't apply to other online sites which do ship items?

What stops an ebay buyer from the same malicious litigation?

Usually markets like ebay have reputation systems for both sides, and it is easier to enforce disclaimers and arbitration agreements.

None of that stops a willful malicious individual like the topic of this post.

And that's just ebay. The comments in this thread were about generic online transactions between strangers, not about any specific site.