It is not necessary to use aggregation techniques to find the information that PleaseRobMe once provided; why were these techniques so effective?

What will be an ideal response?

When data becomes easier to access, people find new uses for it. Solove is quoted as saying, "When analyzed, aggregated information can reveal new facts about a person that she did not expect would be known about her when the original, isolated data was collected."

The reason why the aggregation techniques of PleaseRobMe were as affective as they were is simple: even though a robber could find the same information by individually checking social media sites to find people who are away from home, they are unlikely to do so because gathering all of the data and analyzing it is too time consuming when done manually. By aggregating the data, PleaseRobMe created a much greater privacy threat than the individual social networking sites do in releasing the gathered data.