My local homeschooling organization has the Pearls books on their recommended resources. Several members have written to the board to ask that they remove this book (so far their response has been that they have no intention of removing it.
--still if enough members write them, hopefully they will reconsider. If you know of any local organizations recommending the Pearls, I'd suggest writing or e-mailing them a letter (even if you aren't a member, you can still express concern, or even let them know that you are not a member because of their recommendations.)
Too many churches and homeschool organizations are still promoting the Pearls to impressionable/inexperience new parents. I think the best thing we can do at a local level is to let groups know how objectionable the Pearls are, about the recent death connected with the Pearls and the Pearl's unorthodox religious beliefs.