Geez, I don't think those kinds of emails belong at work at all, whatever the stance may be. Substitute "gay marriage" for "gas tax" and you've got a firestorm.

Of course, I don't think emails about the upcoming Girl Scout cookie sales down in the employee lounge to support someone's daughter are a good idea either (or Tour de Cure/Lymphoma rides or office Christmas donations to the local shelter etc.). Just doesn't belong at work.

Of course, I work from home in a company with only three employees, so it's very easy for me to comment so freely on things that do not effect me in the least.

Carry on!