OPINION — Last week I was poking around in my office trying to come up with an idea for a Thanksgiving column, which is not easy after 28 years of Thanksgiving columns. After a while it’s hard to come up with something I haven’t already said about any subject, and holidays are particularly challenging, since they come around every year. There are only so many ways to say ‘special time,’ or ‘family and friends,’ or ‘restraining order.’