Having hosted many Hallowe'en parties, I have noticed that some of my friends have a serious problem at this time of year - costume anxiety. Costume anxiety seems to especially affect those with a reputation for creativity or artistic talent. They feel pressure to come up with a costume that will impress everyone.
How serious is this problem? Let's just say that far more than one person has confessed to me that they did not come to a Hallowe'en party because they couldn't come up with a "good" costume.
If you have costume anxiety: It's true, you can't go to a Hallowe'en party dressed like you normally dress, but all you have to do is put on a flannel shirt and a tuque. Your presence will be valued far more than your absence. People with elaborate or especially clever costumes will bask in your appreciation. And the other hobos and hosers will relax in your company.