Exploit is strictly forbidden in this game so..... yeah he broke the game rules.
The full wording is "Any player who finds an exploit in the game (e.g. the ability to hack in values outside the normal game interface) is obligated to report it, either by contacting an administrator or posting in the bug tracker. Anyone who uses this kind of exploit (publicly posted or not) to gain an unfair advantage or circumvent restrictions will be treated as a cheater and penalized accordingly. Penalties include deletion of the offending airline, suspension of the player account, and so on."
What unfair advantage does this give? What restrictions does this circumvent? It's like building in a shortcut into a multiplayer racing game and then telling everyone not to use the shortcut.
CLT, BOS, JFK, LGA, EWR, ALB, BDL, SYR, HPN, EWN, RDU, PHL, ATL, CVG, MCO, DCA, IAD, BWI, MDW, HOU, DFW, PHX, DEN, BZN, FAT, SAN, LAX, BUR, SBA, SFO, SEA, ANC, KOA, MTJ, MBJ, SXM, CUN, PVR, YVR, SJO, JNB, LLW, LGW
A319, A320, A321, A333, A346, B734, B738, B752, B762, CRJ2, CRJ7, CRJ9, E145, E170, E190, DH8B
AWE, AAL, DAL, UAL, SAA, SWA