But this is so far out of my area of expertise that my search was probably worthless anyway, because I may not have been able to properly assess any sources anyway.
The effects are also dependent on the type of wood, as some woods do naturally contain tannins which act as MAO inhibitors.
Harmala alkaloids, of course, are naturally present in Penganum harmala, one of the two traditional ingredients of Ayahuasca. The inherent psychoactivity of this family of compounds cannot be overstated.
The implications also touch demographics, since humans have great variance in the activity of their MAO-A and MAO-B genes. People who get easily addicted to smoke flavoured food, coffee and/or tobacco may simply have inherited a high-activity MAO gene that they are trying to compensate for.
Cheers!
Just don't smoke, there are better nootropics.
The same goes for coffee and coffee substitutes with respect to caffeine.
It is completely feasible that you simply are more susceptible to the effects of plain nicotine, e.g. due to differences in nAChR genes, or maybe you already had a MAOI source in your daily diet, e.g. medications, cannabis smoke, coffee, soy sauce, beer, wine, sake, roasted/grilled foods...
You're spreading misinformation and could get other people addicted. You're making assumptions on my diet just to dismiss the well-known fact that nicotine is addictive[1]. Most sites that say otherwise are either social media sites like reddit where echo chambers form, or they're obviously pro-ecig and extremely biased.
There are plenty of academic studies regarding the matter of MAOIs in tobacco smoke, and their addictiveness.
Also, most studies on smoking do not make a difference between smoking and pure nicotine. It would be great if you could check the sources of the Wikipedia article to see if this is the case there.