Some tech fields are tricky

I understand the justifiable complaints of people in the medical and financial fields that they should have the right to have customers/patients from their former place of work, since they are following the person who provided them service in the past.

The tech field offers the possibility of a group of workers in the same field offering a lower cost alternative (due to smaller overhead) to their currrent employer. It's especially bothersome if these workers use technology developed by others (i.e. they're selling the product of others rather than a product they developed). I've seen threats of this in specialized fields or field sites. In many of these cases it's more than a wage issue.