I don't know the exact prescriptions or proscriptions monks and nuns embrace, but a couple of things occur to me:
1. Monks and nuns join whatever order they choose not because they are somehow immune from or want to be inoculated against the greed, anger and ignorance anyone might enjoy, but because they see it as an effective means of addressing that greed, anger and ignorance.
2. Entering a monastic frame of reference is not like applying a filter on your computer in order to assure your kid won't see porn. Robes and rituals don't confer immunity. If, in fact, a monastic life could somehow hold greed, anger and ignorance at bay, what usefulness would a monastic life confer. Wouldn't this just be a scaredy-cat sort of existence, a clinging to outward appearances while the heart went begging?
3. Greed, anger and ignorance are not just some philosophical or religious folderol. They are the way of the world. They are my way. Likewise monks and nuns are not plaster saints. They may be worthy of our gratitude, but there is a difference between offering our gratitude and creating stiff-necked ninnies who are gooder than good. What is anyone's purpose in spiritual life? Isn't it, more or less, to move freely and peaceably and with some understanding in a world blessed with endless greed, anger and ignorance? And isn't it to examine -- not just excoriate or hold at bay or name from some exalted place -- the way things actually are? To move freely and without fear ... isn't that about what any sane man or woman might hope for?
Read? Unless someone is illiterate, of course they can read...and read anything they choose. Naughty or nice is not what lies between the covers of a book, it is just what lies in this mind.
As I say, I know nothing of the monastic framework and stand ready to accept correction from appicchato or any other person with experience.
But obviously I decided to blow off some steam in the meantime.