It is up to Mojang to press charges on people.. Like.. Sure if you go ahead and get all of their database, they can legally sue you for LOTS of moneys which people dont have. Otherwise, a minor thing like that.. Theyd look into it and make sure it becomes safer. Uhm..
2. How likely is it(if at all) that a generic server(not necessarily minecraft authentication/login) would attempt to track an IP suspected of trying crack a user(s) password?
Whut? Uhm.. Cracking is done through the help of proxies. Most of the cracks are in the form of a dictionary attack. Few attacks to log in from one ip, that ip gets blocked or banned.
3.How likely is it(if at all) that, that server would take matters into their own hands and attempt to ban me through my IP ( or other identifiable) from their services?
What server? as in player hosted ones? They cant do that. They wouldnt have a clue to whether it is an account which is not the right owner.. Next time.. Spread your questions out.. Its like.. irreadable..
Proxies are safe to hide your ass, but through a long process with the right equipment and right people its traceable.