Jo Hemmings - a behavioural psychologist who worked on all Channel 4 series of Big Brother and Celebrity Big Brother - took to Twitter to share her concern over the model's participation in the new series.
After Hamilton was introduced to the house, she tweeted: "Paula Hamilton - because sending an alcoholic who failed her C4 psych tests three years ago is SUCH a good idea..."
She continued: "At the risk of sounding like a killjoy, it's a seriously irresponsible decision...".
After Hamilton was sent to the basement by Frankie Dettori and Rylan Clark, Hemmings added: "Paula Hamilton in basement? I was going to give her 48 hours in the house, pre meltdown. Much less now. She shouldn't be there at all!"
She later claimed that Hamilton has "way more problems than Jasmine Lennard", who was involved in a number of ferocious spats with fellow contestants Danica Thrall and Rhian Sugden during her time on the previous series of Celebrity Big Brother.
Celebrity Big Brother continues on Channel 5 tomorrow (January 4) at 9pm.