Dropbox is phishing for your computer's password
Stop! Choose ‘Cancel’ !!!
The dialog box apparently lies (again, still trusting this big name firm?) when it says Dropbox won’t work properly and clearly deceives because this is NOT the dialog box that Dropbox should be showing you to get access into Accessibility. Indeed, even with your admin password, it still shouldn’t be able to get into Accessibility. Clearly Dropbox’s coders have been doing some OS X hacking on company time.
Source: https://hn.premii.com/#/article/12457067
I think they do that on full purpose. Ever since Condoleezza Rice joined Dropbox's board of directors, the agenda should be clear that the state wants all your data, including your passwords and private keys. When combined with the FBI's request to have backdoors in every encrypting app and their own decryption keys, the puzzle pieces add up and the picture becomes clear.
Free and open source alternatives to Dropbox:
I am a active user of OwnCloud in my own VPS and I do not see a reason to use Dropbox. When you can have your own server with little less than $25 a month and you can get 256 GB of space, I do not see a reason for Dropbox. Really !
Exactly. Unfortunately for casual users (non-nerds) dropbox is still much easier. Seafile is almost an easy drop-in (ahem) replacement for Dropbox (enables you to host your own server too, or use a commercial provider). Also has better sync engine than OwnCloud/Nextcloud (last time I checked).