This is my thoughts on it. If you've already bought it, play it. Don't give them your money for nothing. Buying anything additional from them on the other hand is a different story. The more people they have playing without buying from the in game store the better.
I can respect Burnt Toast's decision here... the product is tainted by association. It doesn't matter how much fun it is to play, or how beautiful the visuals are, or how much you feel you're ripping them off by not using their cash shop... it's an NCsoft product. NOT an ArenaNet product... NCsoft. 'Nuff said.
To make a bad analogy, think of Gary Glitter. In the early 70s he made music that was brilliant, innovative, and influential, and still is, 40 years later. And then he had to go and get into his, uh... "extra-curricular activities". Doesn't matter now how brilliant he was Back In The Day, doesn't matter that the music was recorded long before he got into his, uh... "extra-curricular activities"; he's damaged goods, FOREVER. When "Rock 'n Roll Part II" comes on the radio (if you can find a station that will still play it) it's cringe-inducing.