"Maybe there's some obvious signs..?"

After all, Madoka knows that she's not always the best at recognising signs. Even though that by itself may be part of her kindness, always trying to assume the best out of everyone.

"I could ask around and see if anyone knows of any.. T-then I could try my best to pay attention to those. I wouldn't want to get hurt or taken advantage of.. Um, I know you'd be sad if I got hurt, after all."

More like 'ready to break some kneecaps', Madoka.