Legal industries are also responsible for a lot of industrial waste that destroys nature. It's not just small independent drug producers/dealers. Big pharma is worse than all the "criminals" put together. But yes, anyone who desecrates the environment for profit should be held accountable for it.
As for Ecstasy.... I once had the pure stuff (MDMA) at Burning Man with a really great girl. It was quite magical and memorable :)
RE: drug waste dumped.