You were taunting him by saying your a vigilante, on a on. Hell you were even waving it into the criminals faces. He'd been watching you from the shadows. Of course he would your his friend and he can't help to worry as the media picked up on your vigilantism and how openly. Tim slowly approached you in full Red Robin gear, careful trying not to startle you during your mission.

Tapping your shoulder and his voice adopting a whisper and a calming tone whilst he spoke. "You shouldn't be here, you know that." Tim considered you a citizen, you were one that he believed shouldn't be burdened to be fighting the criminals of Gotham. He didn't want to stifle your independence but he did prefer to protect you.