Personally, I tend to fall on the side of clipping humanity's wings until it can get itself sorted out on THIS planet a bit better than it presently is before we start the exportation of our crap to new worlds and new civilisations.
But interstellar technology is probably slower in being realised anyway. So I don't think we have to worry about going far into the stars in the next long while.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist