If teleportation technology was possible...?

There are people who work on this stuff by using principles of a space-time continuum. Basically, if we change space, we can change time. I doubt teleportation's gonna be like on TV where they just kinda step into a wormhole and pop into another time period. They're working on sending small subatomic particles through time. As far as people, I doubt that technology would be available, let alone the inherent risks/paradoxes accompanied with time travel.