If some dude accosted you on the street and took just "a few hundred dollars" or broke into your house and stole "just a few hundred dollars" you'd probably be pretty mad, file a police report, demand justice.... And if I heard you telling the story at work the next day and my response was "why do you care so much about a few hundred dollars loss, forget that and move on" it would be a pretty jerk thing to say, right? Obviously the OP should have known the risk, just like you maybe should have known the risk of walking in the part of town where you were mugged, but that doesn't mean it's cool to tell either of you to just chill out and move on.