Is it a breach of confidence if you give no names or identifying details?

I posted a situation on Facebook and didn’t name the parties and didn’t give any identifying hints.  A friend wrote:  “If I was either of these two individuals, I would be really pissed at you for discussing us on FB. I would consider it a breach of confidence. Discussing a case privately among peers is one thing.  Opening it up for global discussion is entirely inappropriate.” I replied, “This couple does not even have a computer.  My job requires discretion, and it also requires sharing and helping us realize we all go thru the same stuff.  I learn from the mistakes of others and am always open for new solutions, hence my posts.”  What do you think?