I don't really see the poster as victim blaming, just ham fisted advice on crime prevention. At worst I would say it is the type of campaign that could be used to (wrongly) justify victim blaming by the type of people who blame victims.
EDIT; maybe it is ambiguous enough to be seen as victim blaming.
Without resorting to being a dick, can someone talk me through the line that exists between victim blaming and crime prevention advice.
Same with helmets. Your fault if a drivers squashes you helmetless
Same with helmets. Your fault if a drivers squashes you helmetless