Yep, could be. Also, your neighborhood CVS / Walmart / Bank of America have cameras. These "anonymous cash drops" are not as anonymous as they appear. There's no perfect solution. Really, the only reason we don't get busted transferring BTC to SR is because LE doesn't give a fuck about buyers. They probably don't give a fuck about most vendors either, considering they can bust 50 kilos on a swift boat with 3 hours of work. You know how long it would take to do an investigation to find a bitcoin buyer?