Targeting a Specific Contact Form for Altering
Thanks for your help everyone. The comments were helpful. I ended up using the var_dump($message) as suggested and then whittled that down to what I needed. As one of you suggested the form name wasn't as long as I originally thought (and it WAS NOT the ID for the form). I think one ended up being 'feedback' and the other was, as you suggested 'contact_technical_support' or something like that.

The other issue I was having was that I was ignorantly naming my module with the word 'alter' in it which was overriding, or being overridden, by the alter hook it was using, I think.

At any rate, short answer is, my code basically works, but use var_dump($message) to find the correct ID of the forms and don't use 'alter' in the module name.