Helpful tip: when linking to trademark registrations at the USPTO, you have to push on a bit beyond TESS (their search engine) into their document repository, which is called TSDR (there’s a big “TSDR” button at the top of all search results, but no reason any normal person would know this). Here is a link to the full WTF trademark application: http://tsdr.uspto.gov/documentviewer?caseId=sn87877778&docId=RFA20180419074924#docIndex=2
A quick search shows 64 live applications or registrations incorporating WTF, 18 of which are just “WTF”, eight of which have been granted in a variety of classes.
