Actually, pirate metal is a legitimate genre. It's written on wikipedia
...Herp Derp.
They are pirate metal, if you listen to their lyrics or look at their covers.
I don't think you understand that a band's genre is determined by the style of music they play, not what their lyrical themes are or what their album art looks like. I don't know if you've realized this, but every supposed "irate metal" band falls perfectly under an already existing subgenre of metal (Swashbuckle = thrash, Alestorm = folk/power, etc.) If a metal band started singing about cats would you make up a genre called "cat metal"?
Lol, I failed there :P, I wanted to show you wikipedia tells us controversial things.
Swashbuckle = thrash
I get your point. I agree with you, since they're mostly thrash. Hadn't realized it that much, since I don't listen to them much.
Alestorm = folk/power
Now, that is what Pirate metal really is. I understand what you mean, since very little bands actually are folk/power metal. And thus I can somewhat agree with you when you say it's not a legimate genre, though it is already widely accepted, and thus, so do I.
Ooooooh... I had it wrong all the time :S not that that changes much in how I see/like (not) that genre, but still, thanks for enlightening me.
And Alestorm's song Keelhauled can IMO easily be qualified as pirate metal mostly due to their use of a violin that is different from other folk bands. Most of their other songs are rather power metal, agreed.