When botting I have some favourite locations, where I set the centre and a good radius to include a good range of stops, with as little water walking etc. as possible. This means that a lot of pokemon sessions start at more or less the exact same location. Perhaps not a flag trigger as such, but it would add yet another "human touch" be possible to have a start at random point within the circle setting or choice.
That is easily manageable by the person and only requires a small shift within the starting location to accomplish this.
Let us hope that is enough. The moving patter within the same area for a significant amount of time might trigger more bells than the starting point itself
