just recently a lawsuit was announced over a Detroit bus company's refusal to accept advertising from a conservative think-tank that seems to targets former muslims and those 'on the fence'--
http://tinyurl.com/2c5fyab some background info:
In Detroit, there is a city-owned bus system that almost exclusively deals with Detroit proper, and separately there is a privately owned company, 'SMART',
www.smartbus.org, that handles nearly all the surrounding suburbs..
Metro Detroit has a populous community of people of Arabic descent, many are muslim, some are christian (most typically ethnic Iraqis/chaldeans, who tend to be Catholic or eastern orthodox); also there is a significant demographic of African-American Muslims (and others)..
Thomas More Law Center: founded by Tom Monaghan, the ex-
Domino's CEO, is a devout Catholic conservative, who since leaving the pizza firm has set out to establish a "christian city" in southern florida..
http://www.timesonline.co.uk/tol/news/world/article735109.ecedepending on how the lawsuit goes, it could end up setting a precedent..