Mate,
Even if we all, or at least 90% of the players are agree on that farming is not good the way how this guys is doing (and there are many others already) and actually makes advantages is not fair. Not fair with the others. Probably this is not against the current rules as it looks there are no rules to cover this at this point of time (as Charlie mentioned he found a backdoor ) but it is still not the way how this should be.
I think that is obvious you can`t hire someone to work with you then fire him/her without paying salary.
The only difference is that we do not have a proper rule for this in BB, but it does not change the fact this is not correct.
You can not pursue and punish all bad guy just because the police could not get them, even if the people may feel sympathy with you. He is not doing a good job, neither for the community nor him/herself.
Using common sense we can not say that this is OK just because we do not have a rule or policy for this.
If we would have a policy in place this will be unacceptable? Come on....