Especially with masks. Hiding yourself is basically the whole point of the thing, historically speaking. Around in these parts, we actually dress up more for carnival than for Halloween, but it's generally accepted on Halloween, too for a couple of years now.
Now I also wear glasses, and everyeone who does knows that totally clashes with the desire to hide your face under a mask.
Long story short, I just found the perfect masks for people like me. Masks you can wear over glasses.
And I got myself the Devil, the Skeleton, the Pumpkin and one that is plain black.... :)