I can't believe you guys...
All this talk of "You're time traveling into the future already" and "You can't become your own grandfather" stuff - c'mon!
You know I mean a device the size of a Mercury spacecraft that seats one (okay, make it Gemini-sized if you want a passenger) with lots of lit-up buttons and switches, a couple of large metal rings surrounding the machine, accompanied with weird humming noises and electrical discharges, and all of it located in someone's basement in the suburbs, of course.
A REAL Time Machine!
And I used to have such high thoughts about this forum....