I get very self-conscious watching people dressed outrageously sometimes... but I think for the most part they are dressed that way because they
want people to look at them. Not everyone in every situation, but in a situation where it might be considered a "costume" it is probably OK to have an extended, but friendly, glance. Not that that helps
me look, of course (see my thread about analysing people on the dance floor

.
That sounds like a fun time, though, the kind of thing I like to do... just get dressed up and do something strictly for fun. On the Star Wars lines of course there are TONS of people in costumes, some simple, but some very elaborate. A lot of the very detailed ones, like some of the Stormtrooper costumes, people assume they bought ready-made. Not so! Most of them aren't even available that way! The Clone Trooper costumes from Episode II for example, I don't think they exist ANYWHERE in reality, they were all drawn digitally for the film (I think I read somewhere that the production crew only had ONE physical model of the costume and helmet). These people study the movies and any sketches or stills they can get their hands on, they talk to shops with vacuum forming equipment and design and have the helmets custom made for them. Most of them look really professional. It makes for a fun atmosphere on the line.
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http://www.idexter.com
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-- The world is what we make of it --
-- Dave
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www.idexter.com