[amelius]

But what if the tracing was done by a consumer who visited a website containing the Helvetica™ font?

[lbotos]

IANAL, but in the past I've heard the term "impliedd license" applied to things like this: https://en.wikipedia.org/wiki/Implied_license

I'd assume the license for viewing the file is implied, but I have no clue if it would hold up in court if you viewed the file -> traced the output (which is copying the typeface, not the font.)