Definitely a tragedy, but I would not go so far as to say that they don't deserve sympathy or "got what they deserved". Little harsh. It could have just as easily been a bunch of boy scouts out playing capture the flag at night, or some bystanders attending to a hit pet, or a stranded family attending to a mechanical.
That said, yes in principle- the drag race is inconsequential in this instance. Their is no law against public gathering night or day. If you stand in the middle of the road or cross a highway late at night and get hit, that's your own fault.
I haven't heard of anything like that before. It will be interesting to hear the fall-out. If an officer hits someone late at night outside of a cross walk and "couldn't see him" they get off everytime no questions asked.