I've desnorkled mine the day I bought the car. Just yanked the sucker out. No issues with water/debri for me. There was a confirmed dyno test a forum user did a while back on his S model and got 5 whp.
Finally: Dyno charts of de-snorked 986S!!!
Honestly I think it should be no problem if you don't throw cigarette butts out the window or wash your car and spray water directly in the air intake grill.