I always do, its worth it, saves money. others will argue you get enough money later in the game; and they are right 2, so it just matters weather you want more cash in the begining or some more stats.
nope, wait... just kill them all! they're never come back then <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
otherwise nope, you need to kill 'em all.
