For someone who spends half the article criticizing ALA because the data reporting methods are statistically inconsistent, you're making a big claim that ALA is a significant reason for Tango's success, with very little statistical evidence.

My second pet peeve of this article is that you seem to fail to recognize that ALA is almost an entirely volunteer run organization. For an organization with 60,000 members, we have very few staff. The Intellectual Freedom Committee is made up of volunteers who do this work in addition to their day jobs.

You do have some good points about what constitutes an actual challenge is confusing, and that we need better data. The terminology definition list, apparently created in 1986, is also in desperate need of updating considering it's almost 30 years old. Perhaps you would like to volunteer your expertise and time helping ALA and OIF with this project? We'd even appreciate help retroactively cleaning and coding the data.

Also, ALA collects challenges to book information via an online form: http://www.ala.org/bbooks/online-challenge-reporting-form or via a paper form that you can print out and fax: http://www.ala.org/advocacy/sites/ala.org.advocacy/files/content/banned/challengeslibrarymaterials/challengereporting/challengedatabaseform_2003.pdf

And the reporting forms linked to from this site that you didn't mention!