I do want to see NPCs actually shopping in the shops. I don't think Skyrim's economy can get by with just me as the consumer base.
As for the stalking, I don't mind it, as long as there is a delay - the shop owner shouldn't immediately be looking over your shoulder if you stroll out of view. It shoudl take them a moment to get suspicious. And they
should turn their back on you from time to time, as in MW (just not quite as much as in MW
).