poll Domain investing and ethics - Are there names in which you would not invest?

Some domain investors think that business is business and that they do not have ethical considerations when it comes to investing in domain names. Whether it relates to the so-called adult names or any other controversial topic, do you put any limits on the type of domain in which you invest?

Note:
Have in mind that I am not talking about trademark names. I am talking about generic names of controversial nature. Your votes and comments are welcome...