You would have to be blind if you couldn't tell those 2 were looking to rape and plunder. I knew what was coming, because some leaked detail said they were intending to do that, but even not knowing that it still would have been obvious. The way the one was reaching for details regarding location, and residence of the farm. Questioning supplies, and his buddy asking if there was women to f**k at the farm made it obvious they weren't looking for hospitality. They were looking for trouble. Also, let's not forget that the one drew down on Rick. That is his fault. And don't say it was self defense. If if he feared for his life all that was required was to put his hands in the air and request that Rick let them leave.
It's becoming more and more obvious to me which viewers have been in confrontational situations, and whether they have dealt with dangerous and suspicious people, or whether they have any sense at all. Rick did the smart thing. You don't tell strangers all the details about yourself and your house in the real world, and you sure as hell don't do it when there is no society and no laws. God forbid some of you ever end up in a similar situation, sans zombies of course, cause you are going to get people hurt or worse killed.