I don't believe there is such a thing as "passive suicide." The simple consideration of suicide rather directly or indirectly caused requires a person to take active participation. Suicide is not something that sneaks up on people. It requires a conscious decision for both consideration then implementation.

The definition above regarding passive suicide by eating and drinking habits would thus mean the majority of Americans are "participating" in passive suicide by lifestyle.

The key is the initial mental consideration of suicide no matter how small renders it active suicide.