The question "Why boycott imdb?" is simple to answer, imdb is not a trustworthy database.
IMDB.com is one of the largest on-line resource that provides free and subscription-based information on Movie and TV productions and people. As a fee-based provider, IMDB.com is held to a reasonable level of accuracy and performance.
Recently, IMDB.com has ignored the abuse of their system and guidelines to allow the unwarranted cancellation of legitimate film and TV listings.
The cancellation policies of the IMDB.com listing service has negatively affected a great many film and TV projects due to the inconsistent and unprotected management of the IMDB database.
Since October 2006 Dante's Inferno has been listed on IMDB.com as a film in pre-production. Since that time its ratings were among the highest for its category( insert more specific..) Without any attempt to contact the producer, Boris Acosta and with no warning, IMDB removed this listing from its database. It was, it seems, the efforts of one or several people who for personal reasons sought to damage the marketing efforts of this film.
This is only a one case that has been made public, however, there too many legitimate productions that have been rejected by this newcomer in the film industry called Imdb.