Your logic is flawed. Trading system being common sense as part of the game has nothing to do with anything. The game developers decide what they want to implement into the game, common sense or common desire has no part of it. It is a game, designed the way they wanted it. If you don't like it, then don't play it.

We have a rule against account trading/selling. Same goes with the weapons. Why are players able to drop certain rares and not their guns? The game was designed that way, the developers wanted it that way for reasons you will not understand.

You claim there are no rules about merging your friend's account into yours. Again, your judgement is flawed. How can you prove your friend didn't sell you his account? You can't. We also can't prove he didn't. For this reason alone, we don't allow "merging" or transfers between two people. It is that simple. Anytime two different people have their accounts merged, it could be part of an account theft, trade, selling, etc.

P.S: He has been banned since last night (PST). The decision for an account reset will be determined by snk, as it is not part of my responsibility.