I think you're hitting exactly the point: Bikki. From what's been said, we must know about Bikki (assuming that Bikki is the only child-assassin who's been let loose)
It is only a matter of time until they find out that FY has been killed at the hive. Now, either they take it that Riker and friends killed FY, which is quite unlikely, though, considering how long he's been terrorizing them (and how we failed to take him out two times in Street Scum), or, more likely, they'll probably suspect that the ratpack had help (which they definitely will assume as soon as they find out about the rather spectacular bathhouse-brawl we had when capturing FY, so again: only a matter of time)
So far not a big problem though: FY had so many enemies that it was only a matter of time (man, I hate repeating myself) until someone paid someone to dispose of him. He's not directly linked to the experiments, so they'll probably just shrug it off and pray for his wretched soul.
Buuut if they now find out that some professionals are investigating the skilljack-incident, it'll be easy to figure out that these guys are in fact the same professionals that took care of their mad dog, which basically is an open declaration of war.
So I think if we let him talk, we have to execute our next strikes very quickly, before they put one and one together and know that we are on their tracks.
Or do you guys see it differently?
Reedit:
Scarcrow has his sword and shockgloves , he could try to kill the work and/or stun Harka, but that would probably trigger quite a fuss.
I don't know much about decking, is it possible for Mark to hack Harka's comlink or whatever he uses and intercept all messages that are supposed to warn the temple or to redirect them to himself, so he could fake a response?