A quick lookup and I see that the following Islamic countries have seen fit to honor the crescent moon and star(s) design by featuring it in their flags:
Azerbaijan, Kazakstan, Malaysia, Maldives, Pakistan, Singapore, Turkey, Turkmenistan, Uzbekistan, Algeria, Angola, Mauritania, and Tunisia.
Here is Pakistan's flag:
Come to think of it, Great Britain and all the Scandinavian countries are probably already in trouble with them.
Wonder if they'll sue Israel, too? And India's flag sports a mandala. All, all in trouble with ACLU and the Southern Poverty Law Center.