I've had this same internal struggle and determined (with others advice) it was best to share and let others control their own destiny as they see fit. Unfortunately, you will know that others are shadow trading you no matter what they say-you just know it, and when you are really wrong you are going to feel really bad for potentially leading some down a dark path but you have to accept that you will be wrong and others should expect and appreciate that fact (besides knowing that they shouldn't have been trading your thesis to begin with)..
From what I am pretty sure of, I think people hear or read the idea and then wait to see it playing out and say- oh, he's right I'm going in- just about that time you'll be scaling out, there will be some volatility as the first speed bump comes up- they will bail for a 2 point loss or 2 tick gain and the cycle repeats- unfortunate but most likely fact!