Hello hello! Great questions, love this line of investigation.
Overall, no, Dax's actions will not impact the NPCs.
a. No, the stock will not be affected.
b. The waiter will sit if invited, but he won't deviate from his usual script. He will get up and leave when he has a new order to fill. Neither remember her usual order, sadly. The bartender won't react to her being behind the bar. She can even tend bar if she wants to.
c. If the gravedigger catches you digging, she'll try to stop you bodily and chase you away. However, if she isn't present, you can dig as much as you like.
no subject
Overall, no, Dax's actions will not impact the NPCs.
a. No, the stock will not be affected.
b. The waiter will sit if invited, but he won't deviate from his usual script. He will get up and leave when he has a new order to fill. Neither remember her usual order, sadly. The bartender won't react to her being behind the bar. She can even tend bar if she wants to.
c. If the gravedigger catches you digging, she'll try to stop you bodily and chase you away. However, if she isn't present, you can dig as much as you like.