A basic question:
A wants to send money to C, but there is no channel between them. But A is connected to B and B is connected to C. So A sends money through B to C.
But what is necessary to (not) become "B" in this case?
Is it possible to use the lightning network without being the "middleman"/"intermediary" for others, or can't you do anything against it? The intermediary gets some kind of reward for transmitting the transaction and that can be relevant for taxes.
Or is there just a differentiation between "people who just send and receive" and "people who also transmit from X to Y" in the lightning network?