I don't think the triangle threat is really that big of a deal on these types of passes.
I use forms of this pass all the time myself. I think the general rule of not going one in, one out should be amended to say don't go one in, one out without good posture. Good posture negates almost every triangle attack.
If you're able to keep your head up in a strong position, you can usually try this pass safely even on triangle wizards. If you are unable to keep your head up, you'll want to either regain a strong posture or just try another pass altogether.
I actually vastly prefer one in, one out stack passes to the more common double underhook stack pass. I am usually able to counter the double underhook stack pass against people with a couple of unconventional techniques, but I don't really have a good answer to the one in, one out versions. Obviously I can go for a triangle, but it's useless against a strong posture.