Hey to insert my opinion, is that most criminals IRL don't care who you are, if they want to take something they will, young/old they don't discriminate most of the time.
The typical thing you think of with a theif may be someone stealing a handbag from an elderly lady because they don't have a way to fight back.
End note, I appreciate what you guys are doing, although entering an area where criminals will likely hang out is just another risk, within your guy's rp, you may not realise this RP'ly being old people you know you're just 'doing your own thing' but I guess it would be something that you would learn within ur RP just as everyone learns within their rp at some point or another that some places are more risky and dangerous places to be. Just like IRL.