yes because getting a 30k karma cost weapon for 20 karma isn't a bug that got exploited right...just like what paragon did with LFR wasn't a bug/exploit ether...
new flash get ready cause this will shock you.
Guild Wars 2 belongs to Anet you pay *the one time cost* to play there game what they say is a Exploit is a Exploit no matter what you think. If they feel it was a Exploit *and in this case it was a clear exploit buying 30k cost weapons for 20 karma* they brought out the ban hammer. then they decided to make it a 72hr ban aslong as u admit to it and remove said items. they did not have to do anything.
sorry but welcome to a MMO that a game company care's about how there players act and you can't run around doing as you please thinking nothing will happen.
it wasn't the fact people got 2 or 3 for 20 karma it was cause they got 1000's for 20 karma each......clearly exploiting.