It depends. Are you making it too obvious? To be perfectly honest, cheaters in the game aren't a real threat if you're any good. You can still kill them. If you are hacking and provide a chance for the other players you won't have a problem. As long as that chance is there and you not making it impossible for other people to kill you, I"m fairly sure you won't have to worry about getting banned at all, but I wouldn't hack if you plan on purchasing NX. There is always that risk.
The flying hack is annoying, but sometimes fun because it's funny as hell killing them. Speed hacking is also annoying and a real pain in the ass. Why would you do it in to open? I will never know. The OPK is the most fucking annoying thing ever!! People have been using it to the extreme and using it way too much.
As long as another player can kill you and you don't do some weird ass crazy shit. You'll be fine. In other words don't taking hacking/cheating to the extreme.