I am somewhat skeptical of the self-serving pharmaceutical-industry "research" on how dangerous mail-order drugs are. The only such study I've seen that actually revealed what they did, consisted of raman-spectroscopy of few hundred samples that were confiscated by the customs service. The executive summary conclusion was that they were virtually all "fake," and hence dangerous. But what the actual data showed is that 99.9% of them were identical in every way to the brand-name drug, however they were deemed "fake" because the packaging was not that of the patent-holder. That is, they were exactly what they claimed to be - generic copies of the brand-name drugs. Probably produced in the exact same plant as the expensive stuff. (The one sample that wasn't identical had the proper raman-spectrogram, but the pill was not the standard shape.)
That's not to say than any random thing you order on-line is guaranteed to be safe, or that any credit card number that you use to do so won't be instantly sold to the Russian mafia, but the "dangers" seem to consist of a lot of misleading hype.