Following on David's post about trademarks below, here is the story of the Anti-Defamation League's campaign against groups using "Anti-Defamation League" as a title, including the Anarchists Anti- Defamation League.
The Anti-Defamation League was helped by some court decisions that lowered the bar in determining what constitutes exclusive use of trade names. Its real name is the Anti-Defamation League of B'nai B'rith. How on earth anyone could confuse it with the National Mexican American Anti-Defamation Committee or the American Italian Anti-Defamation League, Inc. or the Anarchists Anti-Defamation League is a mystery only a solon could unravel. And we know there are plenty of solons on the bench all over America.