Neither the top or bottom banners show for your account, stay logged in and not browse as guest.
The banners are no worse than the explicit pics embedded inside posts and threads, which have existed since this site was created, and can appear in any thread, I could have embedded a hardcore pic right in this post and it would come without warning while scrolling down the page. An adult site shouldn't have to cater to those who want to browse at their workplace or next to their wife or on the train in rush hour.
While there will eventually be an option for members to hide the banners (if they have enough posts in the preceding 30 days), guests without an account contribute zero and I care little about so will soon have to deal with even more links to UKP & PW than just the current banners.
The positives from pushing traffic to UKE and the subsequent growth it will have outweighs those affected by the new banners.