nope- not paranoia at all. When you buy stuff with a credit card, you create a paper trail, quite literally to your front door.
most seed banks are as quiet about their customers as banks should be
That's true- until the entire seedbank gets busted, as happened to Overgrow/Heaven's Stairway.
Getting
specifically cannabis or hydroponic related stuff delivered by mail order to the address of the grow op is
patently unwise, particularly seeds.
Using a credit card just makes it that much easier for LEO to build their case.
When (not if) they get that warrant based on the seed packet addressed to you and intercepted by Customs, LEO will know
what you ordered, precisely
when and from
where and
how much it cost, including tax and postage.
If you MUST get things by post- you must organise a maildrop address, well away from your grow, hopefully at a non-smoker's address- and pay with money orders which were bought with cash.
This is NOT paranoia- it's BASIC security! It's this sort of 'paranoia' that will allow you to run an op for many years... I've been at it for more than 10 years now, without any cannabis-related legal problems- even WITH a fat electric bill (which is paid IN FULL, ON TIME, EVERY TIME).