I met this guy once who told me “Loose lips sink ships” whenever I asked about some project objectives. Well, he actually used it randomly whenever I asked anything. We never signed an agreement, probably because to date, it is still totally unclear to me what he actually wanted.
Looking at the statement per se, he does however have a point! Do not disclose confidential information haphazardly. People will use it regardless of whether you have an NDA in place or are in total lack thereof.
You may lose a promising prospect just for the sake of disclosing a potential partnership with their very competitor. Whatever is out in the news and media is good to go, there is no way in taking it back anyway.
Next time you are being invited for a job interview whilst still employed, be careful what to respond to your potential employer. Whenever I am holding interviews, I end up being deeply shattered by the amount of detail applicants would disclose about their employers voluntarily, i.e. without actually being asked.
Embrace it, “Loose lips sink ships”!