Yer i don't think going overboard is appealing. But giving the members a choice of skins for Halloween is a great idea. That way they can choose to participate or not.
I plan on setting the Christmas skin back on the forum, and then setting it to default from Black Friday until New Years Eve. Then, on New Years Day, I'll set the default to the winter skin.
I'll probably do something for Thanksgiving. The only problem is my forum is for the entire world, so I will have to do things to celebrate everyone's holidays. Time to get a little more research down 😀
I may pull up some wintery theme for December, but nothing really to celebrate the holidays in terms of theme at least. There's nothing really in that domain that would suit my site's theme in general.