Whether recommending something is illegal mainly depends on if the recommendation is followed by dumping using liquidity, or if it's a paid recommendation—meaning whether someone took benefits from others and then recommended it for others to take over. In short, the subjective goal is always to make you take over the bag. One is immediately dumping using liquidity for you to take over, and the other is taking payment to pass someone else's bag to you. Small-scale stuff usually goes unnoticed, but if connections are involved or the amount is huge, reporting it might actually work.