I know it's not code compliant, but do you really think its unsafe.
It's been happening since Thomas Edison's day.
I see an lot of support violations especially above suspended ceilings.
The caddy BC beam clams will clamp to a 3/8" threaded rod. If you had to you could add more conduits this way. I know its not listed for rod, but it works in a pinch.
Caddy should make a clamp with a 1/4-20 or 3/8-16 hole so we could attach to the side of a 3/8 or 1/2 rod for conduit support and box support. Other than the bat wing style.
That would solve a lot of problems.
I came up with it first and call it the Massachusetts Tim. Email me so I can tell you where to send the royalty check to.