So, it seems that the overwelming response is that scrollers should wear a mask, but some don't even though they know they should.
In my case, there are so many other things I come in contact with that I should be protecting my lungs from but don't, then what's a little sawdust. I know that is a terrible attitude, and that I should try and protect my lungs when ever possible, an ounce of prevention and all that.
Thanks for all the info and suggestions. At the minimum I will look into providing better ventilation in my work area. Hope you all got something out of this post.
Now go make some sawdust and hold your breath...