I acknowledge that it was somewhat undeserved to you and there were multiple other factors that influenced my response. Sorry bout that.
A delay before shipment should not inspire suspicion of tampering IMO. If a secret service does this, it will try before stuff reaches Purism or after it leaves. Assuming of course Purism itself is not an NSA honeypot.
In general, Purism says, in their own best interest they try to take care, but ultimately you can never know. Which is not a Problem unique to Purism.