
I've always been of the opinion that if the RP is going on in an obviously public space (next to the bar in the Hostelry, in the middle of an obviously busy street, in the Quicksand, etc), then it's fair game.
The only time I honestly think permission should be asked is if you intend to initiate conflict RP, since a lot of people react to that really badly when it comes to walk-ups (and, frankly, a lot of people handle it badly in the first place).
But, then again, I came from a platform that had really immersive RP worlds where everywhere was IC all the time and people eavesdropped, etc, on a regular basis.
The only time I honestly think permission should be asked is if you intend to initiate conflict RP, since a lot of people react to that really badly when it comes to walk-ups (and, frankly, a lot of people handle it badly in the first place).
But, then again, I came from a platform that had really immersive RP worlds where everywhere was IC all the time and people eavesdropped, etc, on a regular basis.