"Coffee was made illegal in the Ottoman empire because people in coffee shops were suspected of sedition, not because they were having caffeine ODs and dying. Comparing it to heroin is just silly, and I say that as a supporter of legalization."

I think you're right about why coffee was illegal. Regardless, when coffee was illegal my understanding is that every Thursdays there was an event where they drank as much coffee as they could, to the point where there was actually a very real chance of ODing, in order to enter a mystical state. I can't find a real source right now, but here is an unsourced reference at least:

http://www1.lavazza.com/corporate/en/coffeculture/legends/ar...