the argument is not wether they know what it is cause they do. to think a customs agent does know within 3 guesses the EXACT compound just by looking at a vile of oil your fooling yourself. its like cops look at a bong and not know what it is lol. vial with a needle and a bong and rolled up hundred are like symbols of illegal drugs. something in a vial is OBV for injection, they dont just let drugs in they have no idea what they are lol. give your head a shake, they are the same agency you meet when go through customs on a plane. same same, and if you think those guys will let you go through will 50 vials cause didn't test for fentanyl or meth your crazy man. of course much easier to pop you as you packed your bag and possession is 9/10s of the law.
They see where these packs go, see if someone even picks up, see who's sending, see what type of shipping methods they use, see if they have re shippers (as a known technique will route packages through other countries). is someone just ordering small packs but a large supplier, ie is one city getting ALOT more than others so prob a distributor etc. and yes the possible reason is to have a large bust, its not like what triggers them to look is a single address for the big boys as obv will change shit up..
BP, again, just doesn't steal a vial and not offer up explanation or a letter of how to get payed for it etc. lol esp if doesn't line up with declaration.
now if u just order a few kits, your not selling, probably not too much to worry about. but if next time they see you order decent amount of raws may not be so lucky, esp with a gov change and they want to get tuff on crime, or they find some Trans kid who was ordering testosterone/hormone blockers and causes them harm, hammer will drop on hormones...