Aren't some of these criminal fraud?
how is value defined in this context?
Generally, in court, "value" means "market value" expressed in the currency of the court's country. Often the penalties for various levels of fraud are based on the value (= market value) of the gain -- for example, hypothetically, the law might state that if the value was under $1,000 it's a misdemeanor rather than a felony or that if the value was under $100 you can't be sentenced to prison time.
Something like my own privacy which has value only to one person (me) does not have market value.
[edit: added two paragraphs]
Perhaps, but I would have assumed creating a USPS mail forward under false pretenses like this would be fraudulent. They seem to take such thing seriously.
GP also mentions in a sibling comment about what to do if you need address verification for something else (which is presumably of value):
> All you need is a passport or driver’s license and a utility bill with current address dated within 60 days. Most of the time the utility bill can be a “photocopy” and you just change the date or address to what you need. DMV is about the only place that needs an original document and will be familiar with what bills from your area look and feel like (because they most likely live nearby also and routinely handle documents from people in the same area as you).
Doctoring a document like this also seems illegal.