See, it bothers me when people use hashtags on Facebook as they don't really serve that much of a purpose, as you can't use them to search for things. People just think they're being 'clever' and 'ironic', when they're just being 'twee' and 'annoying'. While I often find them annoying on Twitter (especially when people make up really long ones for their own use that no one else will care about), at least they have a function.