Gatland's latest, that many New Zealand players block support runners or use subtle tactics to slow their opponents from chasing kicks, was designed to put Saturday's referee, Jaco Peyper, and his officials on notice.
Peyper officiated in Rotorua, where the Lions beat the New Zealand Maori 32-10, and has just come under some subtle pressure himself.
"There is so much happening off the ball in terms of holding players or subtly holding players," Gatland told the British and Irish media in Hamilton. "We've raised it with the referees already.
"If you listen to the ref mic [in Rotorua], they were talking about it constantly through the game. They gave a couple of penalties for blocking."
It does serve to make Hansen's next meeting with the media on Thursday ahead of Saturday's first test at Eden Park a potentially interesting one, though. Does the All Blacks coach respond to Gatland, or does he ignore it altogether? Knowing Hansen, there is unlikely to be any middle ground.
The use of the media, particularly the travelling pack, to get his point across and score a few points is a slight departure from Gatland's charm offensive at the start of the tour, and indication too that the test series is nearly upon us.
A victory in the first test is key for Gatland, who will feel that if the All Blacks are going to vulnerable it will be at Eden Park on Saturday with only a warm-up test against Manu Samoa as preparation.
Gatland appears to be enjoying the visit to his home town but is already focusing almost entirely on that first test, and is using all the tools at his disposal this week, just as his players must.