Actually I like my idea so much I think I'll outline it for people to rip apart. Well, we know that in film convention that if you have a flashback, usually the date appears to indicate to the audience that it is in actuality a flashback. I'm going to borrow Nitram's idea of the universe correcting itself.
Now, all the universe would have is a parallel timeline to compare to, or many parallel universes. If things deviated from the parallel timeline enough, if certain conditions were met such as the time traveller dying or the time machine getting destroyed, the universe would enact vast physical changes on a large scale to the damaged universe, using the "reference" parallel universe as a baseline.
That would explain why using time travel as a weapon would be difficult. You would have to go out to all those parallel universes and alter them, or alter the one which the universe is using as a reference for that particular one. That would explain the differences in time travel technology. In one parallel universe, the Federation maybe has a 1% chance of developing time travel as a weapon so there's many other parallel universes which do not and the universe can use those as a baseline to correct it. But a race specifically inclined to time travel, like the Krenim, have perhaps 99% of all existing universes which time travel. However, the universe would "find" that unaltered universe, and through massive physical changes eventually revert all universes to their proper state. Just that it would take a lot longer with the Krenim than say the Federation since the majority of parallel universes of Krenim have them as time travellers.
At no time is logic violated, because you aren't actually "going into the past" to do things. You are simply jumping between universes, but eventually the universe will catch up with you and fix all your changes. This is supported by film convention, since true flashbacks are rare and only in cases like the ST:II (hey, I didn't say my idea was perfect.)
Darth Wong wrote:So I can't blame Trek because they do this kind of idiotic "Oh I have a vague theoretical idea in my head, I can make it reality overniight" bullshit all the time? How the fuck does that diminish the accusation in any way? Are you on drugs?
I guess you can. I retract all that. You're right, prior stupidity doesn't mean a new writer can't come up and retcon it all out so he's responsible.