Is possible to enable uploading and disable downloading
You can use Dropbox Uploader (code). It works with MacOSX, Windows/Cygwin, and Unix. It allows file and recursive directory upload.
To upload a local file to a remote Dropbox folder:
$ ./dropbox_uploader.sh upload snort.pdf Documents/manuals
Example: recursive upload:
Alternatively, you can use the selective sync feature of Dropbox, if your laptops don't need to use the same folders:
