Public service announcement: In order to block specific posters, make an account, go to "My Home" and then "My Settings". From there, scroll down to "excluded Uploaders". Add the name of the uploader (copy paste). Remember to click apply at the bottom of the page.
If you want to block specific artists, tags, etc. Go to My Tags, add the tag you want to block, select "hidden", then save. If you are unsure on how to block specific tags: right click the offending tag in gallery, open in new page. This gives the name of the tag in the search bar. Add this to the "my tag" page. This can be done for any tags, including artists.