Final answer here to make 1 thing clear:
1:
directly from
http://wiki.openttd.org/Multiplayer_Rules:
Don't cheat to advance yourself within the game. Joining a company operated by someone else [...] to transfer money to your own company is unacceptable behaviour ...
It is obvious that sending money to your own company is NOT allowed by the general multiplayer rules.
2:
from our own rules:
The main intention of these rules and of every admin watching the server is to keep the fun for all players up. If you work against that intention and constantly annoy players and/or admins – even with only things that the rules don't explicitly forbid – you're still risking to get warned/kicked/banned!
Since it was clear that it was unacceptable behaviour (including the discusions afterwards) getting a punishment was in place.
From my point of view there is no need to change our rules and no need to disable moneytransfers (since they are still mostly used in a positive way to help newbies)