When editing a file from an SFTP server, the Mac OS first pops up a dialog asking "Filename.blah may be a script application. It was downloaded from the Internet and will be opened by XEdit. Are you sure you want to open it?". It's a hassle to go through this on every edit to a text file on a remote server. Cyberduck should be able to remove the quarantine flag on the file (xattr -d com.apple.quarantine Filename.blah) and give the user an option of bypassing this warning.