Doug had grudgingly agreed to Batgirl, in a moment of clarity, that he would not seek to go out and fight crime with her. What he hadn't promised was that he would still be out on the city's rooftops, holding onto that perspective, listening to the city as it talked to him through sound, smell and movement. He came out to the rooftops to clear his mind, to find a center, and to stick to it. At this point, he wasn't sure what he'd do if he actually witnessed a crime being committed, but he was sure Batgirl would understand if he didn't stand by and do nothing.
It had been a while since he'd connected with her, or any of his friends, since most of them had unmasked a while back, before that bizarre alien television invasion. So, when he saw Spoiler, he cleared two rooftops and landed behind her. "Ste-!" He paused. She moved differently, and the purple cloak looked different, somehow. "I'm sorry, I thought you were a friend," Doug said carefully. Was she one of the Arkham inmates, perhaps? He'd have to be careful.