The Manchester City captain was sent off by referee Mike Dean during the Blues' 2-0 win at the Emirates Stadium on Sunday for what he deemed to be a dangerous tackle.
However, the FA's disciplinary panel had other ideas and cleared Kompany, sparing the Belgium international from a three-match ban.
Ferguson is wary of adding to the debate, believing his comments will be deemed biased because of his involvement in the Barclays Premier League title race.
But the Scot does feel the FA have left the door open to widespread appeals.
"It is bound to happen now," Ferguson said. "But they will probably turn them all down.
"It is very unusual. But that is their (the FA's) problem. I am not getting into it.
"Everything I say will be regarded as me being biased towards our immediate opponents, our friendly neighbours."