It is possible for them to determine popular triggers and front run them. Since they are not a brokerage, I am not sure if they will be regulated/punished if they do front run trades.
we have plans to be become a registered investment advisor, which means we will have a responsibility to act as a fiduciary to our clients. We would never do such a thing as front running. In fact, what we would love to do is to offer back insights into the community, such that when you are placing triggers, we can tell you averages of where people are thinking of buying or selling for that stock as an indicator of key price points.