There's a particular plant (ahem) which is illegal in most nations but which greatly inspired Toki Pona and which is used for recreation and/or meditation by some people. If it's used for recreation, it's referred to as kasi nasa. When used for meditation, it's called kasi sona.
Is it accurate to say that it "greatly inspired" Toki Pona?
I, personally, smoke about twice a week. I did make a connection between Toki Pona and pot, but I didn't know others thought this as well.