To disagree mildly with my friend Paul, I wouldn't have chosen "taste" for the thread title: it sets up an adversarial relationship between the Pro-Nudes and Anti-Nudes here, where the Pros are against "taste". I don't think that was the intention, but it can make folks defensive.
It's possible to make the gallery "family-friendly", but it's very hard to find out how. In the Gallery, click on the Profile link in the upper right, and then choose to Edit Profile. The top option you will be presented with is "Do you want to block mature content?"
The trouble is, this is the only place I've found where this option can be set, and it's confusingly an aspect of your "profile" that is also apparently editable in other places, but which do not present this option. If you choose the "User CP" link at the top of any page, and choose "Edit Profile" there, you will not see this option presented to you. The Classifieds also present a different "Edit Profile" menu. So really, these should be labelled "Edit Gallery Profile" and "Edit Classifieds Profile", or the User CP "Edit Profile" should contain all the options for everything on the site.
In any case, restricting one's view of the gallery is doable. Restricting one's view within threads is another matter altogether. If the post interface had a "mature content" checkbox, such that the post could be collapsed for folks who set their "see mature content" setting to "no thanks", that would be a great addition.