Broadcaster and Channel Nine commentator Ray Hadley has reproached former footballer and television personality Andrew Johns for alleged inappropriate behaviour at an airport last week.

"I don't understand the mindset of someone who would make a comment like that," Hadley said of Johns' actions, which are alleged to include asking a woman for a kiss and later asking whether she had had caesarean births for her three children.

Hadley described the comments as "abhorrent" on air on Monday morning after the historic NRL Grand Final on Sunday from which Johns was excluded.