I'm sure the orbit of this thing started a few million years ago, so 50 years of ANYTHING human will be of no effect.
Eat, drink and be merry.
Will the FReepers of 2068 be able to access this thread from the archives?
No, MtnClimber is right, we could easily nudge it into a safer orbit. The question is whether it's enough of a threat to make it worthwhile.
It will apparently pass closer to the earth than communications satellites in 2029, but the uncertainty in its trajectory is much smaller than its distance to earth, so it should be safe.
The 2068 "close encounter" should put it further from the earth than the sun (!), but the uncertainty is enough that there's a 1:150,000 chance that it could hit. That's not really much of a worry.
Even if it hit, it wouldn't be an extinction-level event. Might cause some temporary climate cooling, though.