Thank you. Mrs Rice isn't what would make Dropbox unsafe, it's their lack of encryption and other insecure practises. A quick DuckDuckGo search yielded these articles:

http://www.darkreading.com/vulnerabilities-and-threats/dropb... http://www.wired.com/2011/05/dropbox-ftc/ http://thehackernews.com/2013/07/hacking-dropbox-account-vul...

(This is just a semi-random selection.)