A lot of weird stuff goes on: some of it is due to it being a beta, some of it is "Normal" and will always be with us, and some of it is due to cheaters. The fact that it's free at the moment means that there's no financial commitment to exclude those who just wanna raise hell.
Yes, I've laid in on the cannons and dewinged planes, only to see them disappear in mid-air. I've seen p51s "Dance" in my gunsight.
Are these cheaters? I dunno. I sure as hell get frustrated, and I do let my frustrations show on Chan. 1; (e.g., "Hmm... Anyone else see that one-winged bish george disappear?","I got that one on video, XXXXXX") I don't openly accuse folks of cheating, but I confess I've insinuated it more than once.
On the other hand, I've been on when I've had green-beacon megawarps (Bird of Prey style). I've been hit and while augering AH has crashed. I've lost my Hstab and, perhaps thanks to the imperfect ground modelling, managed to set the bird down and walk away. None of these activities has garnered me the accusation of cheating. Of course, when these things happen, I do my best to tell my adversary exactly what transpired.
The only time I've been accused of cheating in this game was for doing vertical scissors in a FW.
People get frustrated. If yer honor is challenged on channel 1, make a brief defense ("you got me vstab buddy") and then take it on private. If someone is then insistent about yer bein' a cheater, they're just making an prettythang of themselves in public.