MSIE 6.0 appearing in client header - Indication of bot?

On the logs to one of my websites, I always track the client's browser and OS. Every so often I see one with MSIE 6.0 and usually the http_referer field being blank. Since MSIE 6 doesn't exist in the wild anymore, would a good policy simply be to redirect all clients whose user agent contains "MSIE 6.0" to someplace else (as well as all clients whose user agent is blank)?

Thanks in advance.