Why is poison use "evil"?

[eggynack]

One of the major problems is that Sleep Poison, something that should arguably be a tool of Good-aligned nations due to its ability to incapacitate foes humanely, is a D&D sacred cow for Drow slavers. Slaughtering that cow would be a necessary step in realigning (pun intended) the poison rules.

That actually isn't a problem. Drow sleep poison is already explicitly mentioned as a non-evil poison in BoED, in spite of its associations.

Edit: Which, come to think of it, instantly negates any argument that isn't, "It deals ability damage." Oh, wait, I haven't yet negated the part about it being damage over time. The fact that dragon bile lacks secondary damage and is still evil is what negates that part. Blue whinnis also, given that the secondary effect is not ability damage. So, I guess all the other arguments, about this being unfair or control removing, are irrelevant. Not like falling unconscious is any less hazardous to your health in a battle than taking a couple points of constitution damage is. Thus, the only thing needed to negate the argument that poison being evil makes sense is that there's a ton of stuff that deals ability damage which is not evil.