I've lived in Northeast Seattle (near 125th) and South Seattle (othello) - seen needles at the Van Asselt community center when taking my kid to daycare. The staff had to sweep the park and wading pool daily. In Lake City, all around the Lake City mini park and what's now the skate park.
I'm an advocate for finding solutions but to disregard the reality faced by parents just trying to prevent their kids getting stuck with used needles is real man.