The Falcons are an expansion team of no particular note. There’s really no good reason to hate them except the team colors (red and black in case you’re interested) and Michael Vick. They’ve been historically somewhat ineffective in post-season play relative to their overall winning percentage.
The ‘9ers on the other hand are a storied program tracing their origin back to the All-American Football Conference. Their ascendancy in the ’80s was roughly co-terminant with the despised ‘boys, but their fans were nowhere near as loud, obnoxious, and arrogant.
Now there are those pointing to the investigation of Michael Crabtree for sexual assault as a reason to favor the Falcons, but I don’t see it. For one thing they didn’t fly him to the Georgia Dome to ride the pine. A late breaking development is a second witness that supports his version of events.
In any case this particular edition of the ‘9ers is not a one dimensional team dependent on him or even Colin Kaepernick for that matter. What they have this year that they lacked last is a solid offensive line that can protect anyone they put in the pocket and open lanes for their rushing game. It’s not impossible that they’ll lose, it’s just hard to see how.