I've been reading these boards for over a year now, and have seen a couple of posters say that they received a visit from the Feds in regard to their int'l purchase of scheduled meds. Personally, I think that there has to be some type of motive for the Feds to even investigate an individual, and this would most likely begin with intent to distribute. If they feel that the person who is purchasing meds is buying in quantity, or if they have been tipped off by someone about the situation, etc., this would lead to an investigation.
I'm certainly not saying that an investigation won't ensue if you don't have these factors going against you, just that it's unlikely. It doesn't make it right, but there comes a time when you have to weigh out the consequences and determine if ordering is worth it to you, even with the looming possibilities. If you're in serious, chronic pain, then the answer may be more clear.
I will say that from what I've read (especially the one ongoing thread here), it looked like the authorities thought that there may be an intent to distribute factor, instead of just personal usage of the meds. The person who was ordering could have had nothing to do with distribution, but they were led to believe one way or another that this was the case, and decided to investigate. This person could also have been ordering large amounts on an ongoing basis. There is not enough manpower or funds for the authorities to check out every suspected individual ordering from overseas, and there are NUMEROUS people who obviously do order internationally.
I'm not condoning it at all, believe me, but just offering some thoughts about it (and re-iterating what others here have said too).