tedster - 5:19 pm on Oct 31, 2011 (gmt 0)
A little while ago I would have agreed with you. However, in recent weeks Bing has publicly stated that they DO use the meta keywords these days (in a small way).
As you mentioned, they will be wary about any sign of spammy keyword stuffing in the meta keywords element - however, the choices here don't look particularly spammy to me. So I'd say keep it.