I am aware of a recent bust in the US; an email source was investigated for mailing out various Sched. I substances as well as other meds. I know of at least one person to whom a controlled delivery was made for just one vial of ketamine, which is Sched. IV, as part of the sting. So yes, it's certainly possible. All this discussion of how potentially difficult it would be to bust you is moot if the source is already being watched by LE.

I realize that a sketchy email source and an IOP are two different things, but I feel the warning still applies.