We have celebrated the Solstice instead of Christmas for years, but we always have a tree, candles, yule log, egg nog... For my family, these traditions represent a fun holiday together when we talk about the new year and dismiss the old. All of those symbols of Christmas were just usurped from the Pagans anyway.
As to getting stoned... Where I live, there is active hatred and fear of atheists. I admire folks who lead the charge against bigotry. I actively discuss my beliefs with students, friends, co-workers, supervisors and anyone else who wants to talk about them. I write letters to the editor in support of free thought..... BUT I doubt I would advertise it in my yard ;-)
That said, it would warm my heart to see a yard in my town with some atheist symbol... I should give this one more thought.