I don't yet see an ACLU statement on this, though it seems up their alley, and they have a more recent statement on a different case. https://www.aclu.org/press-releases.
(Incidentally, the Ars Technica favicon looks very similar to the ACLU's.)
The ACLU has become a run-of-the-mill left wing org.
For proper 1st amendment protection, you should look at FIRE. Like the EFF, they are willing do defend that which they find objectionable - the ACLU no longer does.
(Incidentally, the Ars Technica favicon looks very similar to the ACLU's.)