Pretty tough to see how Kraft's comments can be interpreted as tampering given the below Definition & Purpose from the NFL anti-tampering policy. The rule is very badly written in that it is self-contradictory, as later on in the same document Kraft's (and many other executives) public statements are defined as tampering due to an overly broad "any public or private statement of interest qualified or unqualified" phrase. Unlike Kraft's comments, it's clear that Woody's statements fit the Definition & Purpose section as well as the later overly broad section that every mediot (and Jets homer/lawyer) cites.
http://www.dawgtalkers.net/uploads/2009%20NFL%20Anti-Tampering%20Policy.pdf
Definition
The term
tampering, as used within the National Football League, refers to any
interference by a member club with the employer-employee relationship of another
club or any attempt by a club to impermissibly induce a person to seek employment
with that club or with the NFL.
Purpose
The purpose of the
NFL Anti-Tampering Policy, as it applies to tampering with
players, is to protect member clubs’ contract and negotiating rights, and, at the same
time, to allow the intra-League competitive systems devised for the acquisition and
retention of player talent (e.g., college draft, waiver system, free-agent rules under an
operative collective bargaining agreement) to operate efficiently.