They will continue to be. ALA policies are based on the 1st Amendment and accepted best practices of the profession. When libraries make policy in concert with ALA policy it is because they believe in the principles of intellectual freedom and ensuring the greatest access to resources for all. Attempts by state and national legislators to mandate filtering or other library use policies are not only inappropriate, they violate basic democratic principles of self-governance. While sexually explicit material is always at the top of the list, many people want to shield children from material on homosexuality, violence, drugs and alcohol, hate speech, the environment, and, perhaps ironically, even sites that advocate free speech on the Internet.
Parents are frightened and they are looking for solutions.
In a broader sense, this is not a new phenomenon. But there are many ways in which we can and do support parents. The questions being raised are not unanticipated. Nor are they new. The Internet is neither good nor evil.