Maryland House Bill 661, Internet Child Pornography - Removal, is opposed by the advocacy group Center for Democracy & Technology (CDT). CDT staff counsel John B. Morris testified before the Judiciary Committee Maryland House of Delegates on March 4 that the bill has "...due process problems under the Fourteenth Amendment, free speech problems under the First Amendment, technical problems that create a risk of instability for the Internet, and effectiveness problems..."

The CDT contends that the Maryland bill is substantively similar to a Pennsylvania law, and would result in the indiscriminate blocking of potentially hundreds of sites.