This just popped up in my stream – at work.
I have no objection to that content (I quite enjoy it, actually), and I support the statement behind 's post.
I carefully segregate that content off into a little NSFW circle that I don't see unless I go specifically looking for it – while I'm NOT AT WORK.
When you +1 something, you're going to drop it into other people's streams in an automated fashion – and the feature has no idea what other people might want to see – or when, or where.
The two options you can exercise as an individual are:
A) Quit plussing anything but the most vanilla of content. This creates a chilling effect on the +1 process, and that's not good. Plussing something is a communication between you and the author that shows support, without rising to the level of having to create an otherwise worthless comment that says nothing but "Nice Post! I Approve!"
B) Change your setting so that your +1's remain private.