Fuck, there are some narrow minded fuckers on bluelight.
Re: Kratom, it might be worth investigating the environmental effects of that industry and its growing demand.
Many of the increasingly popular ethnobotanicals have dubious origins, in regard to deforestation, destruction of habitats of vulnerable flora and fauna (often in developing countries).
Being aware of the source of such drugs (and their affect on the natural world now) is much more important than animal suffering in the past - that's my take on it anyway.
I mean...look at what the cocaine black market/drug war has done to certain South and Central American countries.
As has been noted - it's a cruel world. Try not to let it overwhelm you - trying to do the righteous thing is admirable, but ultimately, what's done is done; projecting past wrongs on a drug (as opposed to - say - a company that engaged in that animal testing research, and is now selling the product) seems a bit of a stretch to me. I think it is a pretty indirect relationship, ethically to avoid a drug for testing done using that drug 100+ years ago.
I mean, direct your energies in whatever direction you feel is right (that's commendable, in my opinion) - but keep stock of what you can influence (even if it is extremely small).
If you don't agree with the OP's ethical perspectives (we've all got 'em - they just vary) - how about making an intelligent contribution about it, rather than just flaming?