I see it thrown around in almost every thread where someone is worried about a lapse in OPSEC, trusting a shitty market, or large busts that; "LE wont go after people who order personal amounts" or "its not worth LE time to prosecute someone for a gram of sand". In my opinion the lack of evidence to the contrary does NOT prove this. What would prevent those involved in Onymous from forwarding their "low hanging fruit" or unencrypted address info to various local LE, who can decide what to do? Speaking from a more rural town (north of belize), my local PD aren't busy or understaffed and would absolutely love to show off busting an "international online drug smuggler".
For a multi-region, million dollar operation, its true that its not worth their time to investigate small purchases for personal use. But to think that they've just filed the info away as irrelevant is a dangerous mindset. Im not trying to spread FUD, and am not a lawyer, but dismissing a small lapse(not encrypting address etc) in OPSEC could definitely get you under more scrutiny, as LE would have possible probable cause to monitor you a lil more closely. I know that receiving drugs in the mail isn't illegal, as you could send some to senators and get them arrested(im not gonna send 200$ grams of sand to someone to frame them though). Having your address unencrypted on a siezed marketplace raises flags.
I am 50/50 on this. I do see what you mean but lets be realistic. LE's main aim is to stop the distribution of illegal substances. The best way to do that is to bust the vendors and distributors.
It s true that LE can and will bust for personal use amounts but the charges will be less severe than if you are ordering big. A big order is far more likely to catch LE's attention as it is easier to catch in transit and it is more likely the buyer intends to sell and distribute drugs into the community. IMHO your OPSEC should be the same, big or small order, but you have to think what LE want to accomplish in the long run.