I disagree - I think there will be problems importing into the US. Evidently some cigar importers were caught by surprise recently...
http://halfwheel.com/cigar-imports-met-with-new-fda-filing-requirement/127536
Granted, these are cigar importers, not individuals, but I don't think the US Customs and Border Protection Agency is stupid. Yes, I know Fasttech (and probably other overseas companies) use names of individuals as the return address but they have these neat things called computers and scanners now. If a package from 'Mr. Li' (Fasttech) gets caught once, that name will get flagged and they'll start checking all of 'Mr. Li's' packages.
They'll also probably start flagging the recipient's names. I know the only things I get from overseas is vaping supplies.
Will they catch everything? No. But as time goes on, they (the CBP) will get better at finding things.