Obviosuly you havent tried it then......Throwing is VERY annoying when your ina nice melee and suddenly it ends with headshot francisca BUT, THATS THE POINT. I imagine it was the same in real life: Turn your back on a viking, he will chuck an axe at you.
I do fine with 0 PT and 70 wpf on one char, PT3 and 120 wpf for my semi deidcated thrower, its still not easy to hit AWARE people.
If you arent looking or taking evasive, your dead meat for ANY ranged, but unless you are climbing a ladder, its not TOO hard to avoid someone chucking stuff, and they dont have much ammo anyway.
ONLY way I can see throwing being a problem would be if I had made a pure STR build, but since this is suicide vs any decent player anyway, noone should have a real probelm avoiding projectiles, its when your NOT LOOKING that they get you mostly, and in that aspect, WHO CARES if it was a throwing star or someone clubbing you, backstabbed IS backstabbed.