That stuff isn't visible on Danbooru unless you buy the 'gold account', which last I checked is a one-time $20 purchase. Browsing the pages will often have a no

That stuff isn't visible on Danbooru unless you buy the 'gold account', which last I checked is a one-time $20 purchase. Browsing the pages will often have a notice at the bottom along the lines of "2 posts on this page require a gold account to view." - those are typically the 'contentious content'.