actually, i tell a lie... there is inconsistencies in regards to activity feed... you will always see nudity there as that has never been properly filtered from the start, fyi...

just tested it for that specifically, and these are the steps i took:

found a pic in the galleries w. nudity...

changed my profile to end seeing nudity...

went to the activity feed of the person w. the nude image...

viewing nudity on activity feed since gallery options don't prevail in that area of the site...

hope this makes sense