Buying drugs over the internet and having them mailed to your house puts you at risk of federal felony charges. Lower one risk, increase another.

Unlikely. The package will be confiscated if found at a border crossing or in transit, but it doesn't appear charges are brought against the recipient (the sender might be pursued though if within the jurisdiction; this is why I assume many of these types of shipments originate outside of the US). Not that I recommend doing so, especially with anything considered a controlled substance or on a federal schedule.

Most people buy drugs online with delivery in-country, to get around borders and customs.

You're still right though - most often the marshals will just confiscate the box and leave you a note about how you can claim it if you really want it.

Oh of course, I'm just saying that particular argument of quality doesn't seem unique to online sales.