But that's exactly what his former wife has done after their acrimonious divorce.
Joanne McCue Bannatyne has placed a poster advertising her new gym, which she hopes will provide competition for Clydebank-born MR Bannatyne's chain of health clubs, across the road from his headquarters.
The billboard shows a picture of Ms McCue Bannatyne with the words "Welcome Your New Neighbours". She set up her CrossFit Gym in the former Darlington Football Club stadium in May, while Mr Bannatyne's nationwide gym empire is based in the town's Haughton Road.
She was unavailable for comment but told the local newspaper, the Northern Echo: "Whether or not it's controversial, it picks up people driving into town from Teesside."
Mr Bannatyne's divorce from his second wife has been acrimonious and their Californian-style family home in Wynyard, County Durham, was put up for sale earlier this year.
Earlier this week, it emerged the price of the house had been reduced by £75,000 to £800,000.
In 2011, Mr Bannatyne claimed he would have to lay off staff to meet his former wife's financial demands.
Mr Bannatyne's spokesman said he would not comment.