The reality is that most people who pay real money for software and computer services don't think this way. They hate cold calls from salespeople, sure, but a human call from someone who actually wants to hear what they think is so rare that you'll stand out in the opposite way you're suggesting.

I'd like to gingerly suggest that you carefully reconsider any advice you get on a message board about the propriety of directly contacting customers and prospects. Message board nerds like us are terrible at evaluating these situations, and it really holds us back.