Problem is, you don't know. Really.
I just finished a book called "Republican Gomorrah", which details all of the stuff from the "real" Christian right - that being Dobson, focus on the family and all the other power brokers. While most of us know about the Swaggarts, the Haggards, the Bakers and dozens of others - this book goes into detail on how far inside the movement this stuff goes. And, yes, all of these same folks crusade against it!
I'm certain there are some people somewhere who are not swayed by pleasure. But it is so baked into our DNA and brains that the avoidance of it causes more problems than it solves.
Not wanting to argue - just interesting facts since I read the book this week. The author proposes, and I agree, that repression of our desires often causes more problems than it solves....
But, I'm a liberal...which means if it works well for you, that's great! My own belief is closer to the Buddhists who say "the middle way" and "moderation in all things". So far (and I've made it to 60), it's working for me to whatever degree!
Back to the OP - it's the typical dilemma - greed against morality. If ads are being served that you don't like, turn them off. Even if it costs you $$$. I have turned down many private clients for my web site just because their products were of poor quality or efficiency or I didn't like the way they marketed (they fooled people, etc.)...
If your users are of the same mindset, they'd gladly fork over some money to help you make it up...
One way to make up revenue is to ask your users to do their Amazon shopping based on links on your web site. If they are going to buy things, why not have you get the commission (no skin off their backs!).