This question is being posted largely in response to this answer describing the "Adult Lens and Porn Scope" and how to install it.
As Roland Taylor and I commented on the answer, we have concerns over whether this material should be posted at Ask Ubuntu. Besides the fact that someone under legal age could easily install and use the lens by following the posted instructions, some of us also have concerns that it is indecent and inappropriate to even mention on the site.
It was pointed out in the reason for my rejected flag that a chat discussion over the answer eventually decided that it was on-topic and therefore stay. It was also noted, however, that a Meta question would be the proper way to handle this issue, and so here it is.
So, in summary: should we not allow questions or answers which discuss the usage of software intended for use with adult materials?