My company holds the usual Halloween corporate fanfare - a potluck lunch, and various contests with token prizes - pumpkin carving, decorate your office/cubicle, dress up in a costume.
I rarely take part in the frivolity, except for the eats, of course. And for that matter, participation as a whole within the Tech Services Department is always dismal. We're geeks, not freaks.
But I like the idea of a Franz Kafka cockroach costume. Not sure where I'd find one, but if I did, I think I'd wear it next year, just to see how many of my co-workers are Literary Literates.