RANKED: Your own teammember ban the champ you pre-selected.

Why are your teammates allowed to ban the champion you have selected to play prior to the banning phase? This has happened to me (edit: FIVE) times playing ranked games just this week. Banning characters that your teammates have selected should be disabled. As long as LoL has been around: 1) why is this even allowed 2) why is there no recourse for a player that is forced to dodge or pick a different champ, having to play a ranked game with the kind of person who would do a stupid thing like that, and then endure the chat trolling and likely loss, only to maybe get some reprieve via the end game report tool?