During the Lorik Qui'in quest on Noveria in the first Mass Effect, you enter the Synthetic Insights office with a warning that there'll be guards there, but that you can scare them off if you threaten to report them for accepting bribes to Matsuo.
I opted to do that instead of fighting them. When you enter the offices, two guards stop you ,and there's a blue ("Charm") dialogue option which makes them go away. But as soon as they walk out and the conversation ends, my characters pull their guns out, and more guards come charging down the hallway.
Is this a glitch? Or is it inevitable that you have to kill some guards in Synthetic Insights?