is MAOI interaction an issue only with SSRI´s or stuff like MDMA and the possible serotonin syndrome, and with tyramine and possible hypertensive crisis.. 

Or can tryptophan containing food + MAOI also be a bad combination?

(MAOI+tyramine is generally a problem only for ireversible MAOIs, not for reversible MAOIs such as b-carbolines..  what about with tryptophan, also an issue only with irreversible MAOIs or not an issue at all ? )