I agree with your point. However, I think overuse of the word "toxic" is toxic. :-) It seems to be applied to everything from a jerk who sexually harasses women to overzealous blog posts about version control, so the word becomes pretty meaningless. Toxic literally means poisonous, but even its metaphorical definition is "extremely harsh, malicious, or harmful". Why not use a more appropriate word that doesn't involve extremes?