I’m Independent Baptist also, I thought that most Independent Baptist already don’t claim tax-exempt status for just that reason. I know that Lester Roloff and his ministries didn’t. They also don’t get involved in politics, the Moral Majority was evangelical, not fundamentalist.
Everyone likes Lester Roloff, but he was a bit of an iconoclast. Have you heard his famous sermon “The Mule Walked on”? There are very few IFB preachers who’d agree with that sermon, even when he preached it.
http://www.sermonaudio.com/sermoninfo.asp?SID=28101938551