Making setups is part of the game and stealing setups is cheating. It's part of the job of a dev of an online game to fix cheating exploits so saying "someone's figured out the encryption but I am not going to fix it because someone will figure it out again" is a lazy abdication of responsibility. Hacking is not a problem that can be solved, it is a problem that is continuously mitigated against. Hackers are like herpes.
Yes, you can say that you make setups in the knowledge that they may be stolen by hackers but also, you make an online game in the knowledge that you will need to continuously fix security holes or else people will slowly find it unplayable and leave.
As I said, making setups is part of the game and making setups freely downloadable from other players would dumb the game down. Personally when I race in the absolute beginners league, I'll share setups with people who come practice on the servers in the week but I am not that bothered sending to people who turn up an hour before the race, without practice, asking for setups. Setups are subjective to a person but only to a point and time invested should give people an advantage in a game.