From the excellent My Thoughts Be Bloody (about Edwin and John Wilkes Booth):
New Orleans' pleasures came at a price. Many who flocked here annually never returned to their homes but remained in the city permanently, residents of the graveyard.It seems to me that this sentence doesn't really work. There's a referent problem.
If people "flock here annually" they can't also "never return", can they?
I'd like to see something more here, such as "many of those who flocked..."