I absolutely hate getting spam, and despite my views on openness, I'm not much a fan of having my identity abused either. And I strongly believe in treating others how I would want to be treated.
So, I will NEVER share any information about you with anyone without your express permission. And even if I do ask for your permission, it will only be a few basics like your initials and the date(s) that we worked together, for the purpose of verifying our time together should I ever decide to shell out some money for a certification in coaching (such as with the International Coach Federation).
I also may contact you to ask for your feedback or for a testimonial, if you're amenable to sharing your thoughts.