Isn't Harper Beckham too old to be using a pacifier at age 4?

David and Victoria Beckham's daughter Harper, who is 4, was seen out with her dad sucking on a pacifier and this has sparked major debate amongst parents and health experts who feel a child this age was too old to be using a dummy. Health experts say parents who allow their children to do this after a certain age risk stunting their kid's speech and put their teeth at risk of damage.

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They say pacifiers are recommended only for small babies, usually to sooth or settle them whenever they are restless. But there are people who claim they used a dummy until they were 7 and nothing happened to their teeth or speech. What do you guys think?