Shooting stags is allowed in the season by stalkers armed with licensed rifles and with the permission of the landowner.
This caused the city authorities to rethink the way in which stalkers were viewed and treated by the criminal justice system.
So it's now her mission in life to ensure the police take stalkers more seriously.
Stella wants to find out how the police can learn to recognise the most dangerous stalkers and stop them becoming killers.
For some stalkers, the internet is just a tool of the trade.
ECONOMIST: The internet allows the malicious to menace their victims
Her campaign to raise awareness of the danger posed by stalkers is being supported by national domestic violence charity Refuge and her MP Greg Clark.
Rachel MacKenzie, a psychologist who runs a behaviour programme for stalkers in the Australian state of Victoria, says that many now harass their victims through the internet.
ECONOMIST: The internet allows the malicious to menace their victims
Police advise stalkers to get a basic deer stalking certificate (DSC) and companies run by professional stalkers offer training for the DSC.
The misery they inflict seems to motivate cyber-stalkers.
ECONOMIST: The internet allows the malicious to menace their victims
Lord Wigley, a co-sponsor of the amendment, said many serious offenders - such as stalkers and rapists - were able to get away with "ongoing, unacceptable" behaviour because courts only examined individual instances of their behaviour, and did not take into account the "cumulative impact" of long-term patterns of their behaviour on victims.
He said 25-45% of stalkers will be violent towards their victims at some point during the stalking episode.
Valerie Caproni, General Counsel for the Federal Bureau of Investigation, complained to the House Judiciary Committee in February that her agency lacked powers to gather evidence on stalkers using peer-to-peer and social networks.
ECONOMIST: The internet allows the malicious to menace their victims
Having OCD is not the same as 'being obsessed' about a person - and we certainly aren't like stalkers.
Stalkers see their activities as an important part of land management - a key method of regulating the number of deer in the wild.
The study commissioned by Scottish Natural Heritage (SNH) suggested 97.6% of gamekeepers, deer managers and stalkers were men.
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