I don't think it was considered a bad idea. Some mentioned it had been 'done before' but Dropbox outpaced them by making it simple & actually work. Also it was

I don't think it was considered a bad idea. Some mentioned it had been 'done before' but Dropbox outpaced them by making it simple & actually work. Also it was considered too simple as it was really bringing the well known concept of an always-accessible network drive or 'shared docs' folder to the Internet.