If people are taking the piss it’s poor Management. If they are piss takers, they would be doing it regardless of where they were.
Completely disagree @ExtraOnions . I have literally seen people who hide for much longer than they would do if they were in plain sight.
People who go off for two and a half hours because their mother needs to be taken to hospital. They don't book leave, they don't work later to compensate, they just feel entitled that they can be "flexible".
Folk who have busy childcare and collection commitments, who block out their calendar in so many places that it's impossible to hold regular meetings.
There's dozens upon dozens of examples I could offer. But so much of it comes from the fact that once someone is in their home environment, they feel psychologically that "they' call the shots, and that the only metric that matters is "judge me on my output", irrespective of their availability to actually support team mates and collaborate with others.
And you say "poor Management" (sic) but come on, so many managers are complicit in the UK because they want the same 'benefits' and don't care.
Don't get me started on the folk who refuse to ever turn their camera on because "they can be just as productive without it on" and "no one will get to see my home etc"