The WTFPL is approved both by OSI and the FSF, both of whom had lawyers look at it. It looks like they do know what it means.
I'm more of a GNU GPL guy myself, but the WTFPL isn't a bad license.
Edit: Ah oops, OSI did not approve WTFPL. Oh well.
I'm more of a GNU GPL guy myself, but the WTFPL isn't a bad license.
Edit: Ah oops, OSI did not approve WTFPL. Oh well.
He even points out that using it could get you sued due to the lack of a warranty disclaimer by default.
I've heard other stories of companies refusing to use WTFPL-licensed code, and that alone should discourage you from using it if you goal is really to let anyone use the code with no hassle.
Edit: the FSF doesn't recommend it (in contrast to CC0, which they do recommend if you want a public-domain license): http://www.gnu.org/licenses/license-list.html#WTFPL