I don't see a problem with it. I say put it out there and see if it's of interest to the HN clan. By inhibiting yourself, you're only depriving yourself of an audience who might be genuinely interested.
Assuming you are just spamming your app, are there any interesting technical details you might like to share to make this less about spamming and more about sharing?
That's a great app idea but that bothers me to pay for suggestion cards. I understand there is work behing the hood for the iPhone application but still. Does anyone know a website with some free example cards decks to print out ?
"They have been honed by many, many iterations."
For an environment and time that we no longer live in.
Evolution honed our instincts for a reason, but this reasoning was good for jungles and savannas, not urban sprawls and concrete jungles.
The danger being discussed above is that from other humans.
I don't think people have changed nearly enough to call our instincts about them into question.
You have now culture, law, education, and much more conditioning than 50000/100000/1000000 years ago. I would argue that much have changed regarding how other humans react to what we do.