[PsylentStorm]

i think itll take a while for us to realize these things...

but another way to let the engineer know that youre a friendly and not a spy is to hold a secondary weapon (as majestic says) or hold the team VoIP button down (or actually just saying its you on VoIP). when you talk via VoIP, the exclamation mark pops up over your head, indicating youre talking on it. enemy spies cant do that.