Are there any political issues, such as abortion or capital punishment, that are so fundamental to your core values that you could not respect and/or trust someone who held a contrary view?
You might not think of pop-up, pop-under, page-take-over, noisy, and other equally repugnant ads as political, but I do. Those and spam. And telemarketing. I believe you have to sell a bit of your soul in order to allow any of that. Malware-peddling gets beyond political into religious.