100%
If it's just an average game against a random team, he wouldn't do it again.
If it's a spicy game against a rival? He would 100% do it again, but just differently. Maybe fake a slapper and let the puck trickle in?
He's a pest. This stuff is what pests do. Brad Marchard licked someone. Everyone freaked out, so he did it again. He only stopped doing it when the league stepped in.
What Greig did was 100% legal in every way imaginable. He'll do it again when the time is right.
SIX YEARS AGO.
Might as well bring up Scott Stevens hits and argue those were the precedent.