It is probably both effective and creepy in both countries. The article even talks about how some find it creepy:
> Taiwan’s electronic fence has drawn some complaints for its intrusiveness.
> “It’s creepy that the government is teaming up with telecommunications companies to track our phones,” said a flight attendant in Taipei who was put under 14-day quarantine after returning from Europe in mid-March.
> The woman, who identified herself as Xiaomei, said she was scolded by a local administrator after failing to pick up a check-in phone call in the morning when she was asleep.
> “They said the police will come to me if I missed another phone call,” she said. “I’m treated like a prisoner.”
> Taiwan’s electronic fence has drawn some complaints for its intrusiveness.
> “It’s creepy that the government is teaming up with telecommunications companies to track our phones,” said a flight attendant in Taipei who was put under 14-day quarantine after returning from Europe in mid-March.
> The woman, who identified herself as Xiaomei, said she was scolded by a local administrator after failing to pick up a check-in phone call in the morning when she was asleep.
> “They said the police will come to me if I missed another phone call,” she said. “I’m treated like a prisoner.”