To Block the porn posts from view, click on the triangle in the upper-left of the offending post.
From here, you can report, hide, or filter posts by ID number in each bread.
New ID numbers are assigned each new bread, so you have to do it again each new bread, but it will 'delete' so to speak, every post from that person for that entire bread.
Instructions:
Choose Add Filter >ID
All posts from this ID number will be blocked from your view.