Good point, but I'm not sure if fake market behavior (along with the direct exhortations to participation) directly maps onto fake real world behavior with no solicitation.
As a (somewhat ridiculous) counter example, suppose I know you, a trader, love tap dancing and I, also a trader, happen to be a skilled tap dancer. On Monday I show up outside your office and start tapping up a storm. You are unable to resist the sound of your favorite thing and rush out of your office to enjoy my performance. I return at the same hour Tuesday, Wednesday, and Thursday, and by then you are out on the sidewalk expecting me when I show up. Friday you leave your office as usual but you wait for me to show in vain, for I am in my office and taking advantage of your absence to make a big trade against you.
Have I defrauded you? You believed that I would show up to entertain you instead of competing against you in the market, and frankly I trained you to think so only to enrich myself at your expense.