The other night I was fighting a FW190 in a spit. I had a bunch of alt on it, so I wind up on its six counting down. 2.4, 2.3, .2.1 etc.
All of a sudden at about 1.5 it does a 180 vector change and is comming up to me 1.2 , 888, bam HO instant death. There was no turn, no low or high yo yo, just an instant vector change. I had no film rolling so I just blew it off as a warp, but with lingering curiousity. I head back to the same place, this time with film running. The 190 wasn't there but I found a p51. During the fight, which was two of us on the one p51, it looked like it was doing impossible angles. It did die, but after I went and looked at the film. What wasn't shown while it was going on, and was shown on the film, were 15 or so ground vehicles right below us. I have no doubt this was taxing my computer and it was producing some weird results.
So where I have no doubt that ANY game on a pc can be hacked (memory editors etc.), more often than not, its probably something else (e.g., net lag or a weak cpu). Some of the people here know the planes like the back of their hand. If someone was doing crazy stuff with the models, I have a feeling they'd be on them like gravy on rice.