Vulcan Logician wrote:
2) Sticky issue there. Was Gabriel Bell ever Gabriel Bell? Probably so, because Sisko would have seen himself as Mr. Bell having studied him in the Academy. So maybe there.
The case could be made there that Sisko was "interfering" with his own culture and history, and therefor would not be considered a prime directive violation.
If he were to have done the same thing on a non-Human planet, there it would be a violation.
The same with Spock in Yesteryear, no violation.