By Frankie Taddeo The Bengals are favored at home against the Falcons in Week 7 but Atlanta is 6-0 against the spread this season. The fact there is only one team that is perfect against the spread (ATS) after six weeks is not shocking. What is surprising is that the honor belongs to the Falcons, who are 6-0 ATS despite being just 3-3 straight-up (SU). Atlanta beat the 49ers, 28-14, last week as a four-point home underdog and has been listed as underdogs in every game this season. The Falcons, who are 3-0 ATS on the road, will try to lean on the league’s third-best rushing attack (165.2 yards …