An old RPG sourcebook stated that both the Romulans and Klingons had made trips to the past and attempted to alter the timeline to their benefit, but it didn't work out and in the Romulan case nearly caused an unexpected disaster that would have HARMED the Star Empire. When the ship (with the aid of a Starfleet vessel that had followed their temporal wake) returned to the present having prevented the disaster, the Tal Shiar quietly reached out to the DTI a few weeks later to discuss a de facto ban on time travel except for research.
As for FAILED slingshots - yes, ME, in that bloody mission in Star Trek Online, every damn time!
As for FAILED slingshots - yes, ME, in that bloody mission in Star Trek Online, every damn time!
