As has been said many times before, trying to block SatoshiDice transactions is like rearranging deck chairs on the Titanic.

If it's not SatoshiDice that's generating "transaction spam", it'll be something else, and then something after that, and so on. Are you going to launch a new campaign against each?

Also, it's ignorant to vilify the very individuals (Erik Voorhees, Roger Ver, Jon Matonis) who, by their tireless evangelizing, are probably most responsible for making Bitcoin as popular as it is today. If you hold any bitcoins and are enjoying their current value, you owe the aforementioned a debt of gratitude.