Honestly, I'm glad they posted to keep things going, and because I don't usually want the other players to feel like they should not or cannot be involved in a scene in a meaningful way.

Regardless, I don't think you have to worry about Harl Kandor being too discerning on this subject . As long as the acolytes don't do anything too stupid to break their cover, most underhivers are likely going to be too uneducated to recognize that there's something off.