Going to have to get password do-hicky

So it looks like I'm gonna need one of those password doo-hickys to get people to stop spam posting on my site. At first I didn't mind cause it was nice that some of my posts looked to have 3-4 comments. But on further thought its annoying to sit down and think that I'm gonna get to read several posts when in fact its just some jerk that wants me to read about birds.