You don't have to be a member of Fathers 4 Justice to excuse wearing a Spiderman outfit in public - just look at this news video:
http://video.uk.msn.com/watch/video/spiderman-prevents-comic-book-robbery/2g3g7cz0
Now I work in a charity shop which has items stolen every day. 
I might just try it - even if it's not International Free Comic day! 
