But there was a requirement to remain clear of IFR routes was there not? Something the Tobago pilot clearly didn't do, at least not with his brain engaged. 1 in 60 rule anyone? That is why there was a TCAS RA event.
A requirement for VFR aircraft to remain clear of IFR routes would be as much nonesense now as it was then. It can’t be done now, and couldn’t be done then.
One wonders how all of those commercial aircraft flying in and out of airports in the US deal with all the RAs. That’s why I won’t fly on any commercial airline in or out of or within the US. It’s dangerous.