So far in Air RB maps with them, I have seen mostly-harmless BTR-152 Soviet AA trucks with twin 14.5mm guns, located in stationary dugouts next to artillery and pillbox units. Those and similar AA trucks are quite harmless.
But when the AI tank columns are guarded by the likes of Whirbelwinds, Ostwind I/IIs, Skinks, AEC AA armored cars, Kugelblitz, or any other closed-top AA, trying to kill them, let alone with fighter guns, is pretty damn difficult.
And then if you try playing jets and meet a VADS or Gepard…forget it.