Professionally, I'm in the Analytics line, and have started looking into predictive analysis.
But to be truly honest, I see the bad side of Big data in terms of security and ethics as per the except from below:
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There is a saying that knowledge can be a dangerous thing, and in the IT world, that knowledge comes in the form of big data. With big data, you can predict the behavior of your customers. You know what they will likely buy and when they will make the purchase. You can determine quickly when an activity is out of the norm and alert the customer to potential theft. There is so little that you don’t know that there may be a tendency to overuse that information in ways that could make the customer distrustful.
And that leads to the problem with big data: security and ethics.
The bigger the data you have, the more of a target you are. Storing millions of healthcare records or financial data paints a huge circle on your back, a breach at this level could be catastrophic and the bad guys stand to make a hefty sum if they can do it. As for ethics, imagine a health insurance company with enough records to analyze peoples’ health based on data they have, and then trend that health into the future. You might then be denied coverage because your data suggests you’ll be a liability in 10 years.
While there are definitely a lot of benefits on Big data being used by companies, there are downsides to it.
Just take a look at the Sayakenahack incident, and you will know the acceptance level of such technologies in our country.