I joined.
A few things I hope are not mandatory -
* The signature ticker (I really don't want one)
* Joining Goodreads and having a bookshelf (don't want to do that either)
* Deciding in advance what to read? ( this is 100% impossible for me)
* Listing the titles of "naughty" books
(small percentage of what I read but not sure I would want to world to know EVERYTHING I read)