Hughton rapped Van Gaal for touting for Tim Sherwood's job at Tottenham over the weekend.
"As managers in the game it's not the best policy to be mentioning potential jobs when there are already other managers in the job," Hughton told talkSPORT.
"It's a difficult job as it is and there's a quick enough turnover in management without the mention of potentially other managers coming in.
"So if he has said that, it's certainly not something he should have done."
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