Creating a website is writing code too, FBI had no issue arresting website operators.
Ahh... This is where you are confused. With Openbazaar there is no website to shutdown.
https://openbazaar.org is merely for information and ca easily change TLD's or to a .bit to promote the project.
There is no server hosting Openbazaar to shutdown either, the marketplace exists across all users.
If TOR didn't protect silkroad 1.0, 2.0 etc... what makes you think anonymous code contributors are safe?
Nothing is 100% secure with anything digital or physical. The point is to make it impractical because the costs are too high. The FBI can afford to spend millions of dollars to track one server but not thousands of users. The more they attack the first amendment buy jailing people for writing the more devs will join the cause.
The struggle is futile. How successful have they been with torrenting , wikileaks, and the war on drugs in general?