I know what you are thinking
I play Nero a international LARP and yes it does look very similar to that movie. That being said after making fun of LARPers especially Vampire for years, I went to a Nero a event last summer. I have spent very few weekends home ever since, I met some great people and had a great time. I guess what I'm saying is: D&D style LARP=Loose fitting Clothes=OK. Superhero LARP=Bright spandex=very bad.
Tim
http://www.warweb.org/
http://www.nerolarp.com/