Most drugs don't originate in this country to begin with so yes this is a borders issue.
Read a article the other day that stated that of all the addictive drugs....that meth was the "one" that had a extremely low rehab rate......something like only 5% of users can kick it, even with proper rehab and medical. They said that users just can't get off the crap........
With that kind of addictive record of pretty much permanent self destruction one would think this problem would solve it'self eventually.....dang.
Be careful where you're going with this criticism of open borders.
After all, you would not want to discriminate against the upstanding community of Undocumented Americans.