MongoDB

Do I give it 5 stars for being awesome OR give it 1 star for being the key to destroying our privacy forever :/

I'll be fair and grade the product since it works great. However, for reference, I'm referring to the use case of NoSQL for capturing data related to internet adverting and other marketing data as being the driving factor for NoSQL at the start. One of those things, this is going to make everyone's life so much easier and then 10 years later you realize you created the tool that destroyed privacy :/

MongoDB though, easy to use and can handle millions of transactions easily, I really can't complain and it makes running reports a lot easier.

Not an inherent vulnerability, but MongoDB admins should ensure they're avoiding common pitfalls by, among other things, blocking access to port 27017 or binding local IP addresses to limit access to servers. Thousands of MongoDBs have been hijacked by hackers recently:

http://arstechnica.com/security/2017/01/more-than-10000-online-databases-taken-hostage-by-ransomware-attackers/ and https://www.mongodb.com/blog/post/how-to-avoid-a-malicious-attack-that-ransoms-your-data