Most pap walks are staged, because unless its a slow news day paps will not waste time waiting somewhere (and if they do its somewhere more popular, like Craigs). Though of course a pap that follows their divorce closely and knows that he will find a buyer for any picture he takes of them may choose to occasionally wait at the dog park too LOL (though not very likely). The pap walks are almost always after court filings, this indicates either that the paps follow them because they know a picture right now is worth a lot or because their PR tips them off.
What actually does happen often is that celebs get papped by chance/or called the paps and it never makes any newspaper because no one buys it. This has happened to Ioan and Alice a lot over the years btw because ultimately the past 10 years Ioan was just some c-list celeb, the divorce raised (at least temporary) everyones profile. This picture from 2017 for example would certainly be published in the DM nowadays
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I have no issues with their pap walks. It's quite possible that they have a deal with a pap (given that their pictures always get sold) and may even get some small cut out of it. I respect it a lot that they dont do any (or at least very little) PDA in those, and it would be actually quite natural if there was sometimes something. Compare it to what Alice did on pretty much every pap walk with Ioan and recently even with her own daughter: those were 100 % staged lol (if not by tipping off than at least by playing for the camera)
And contrary to what Alice claims the majority of their pap shots ARE long lens shots.