They have to have grounds for deeming you a threat. It would help if you read the act and regulations that govern who is inadmissible (all online) rather than wildly stretching offhand comments in news articles.
Examples of things that could lead to you being deemed a threat: You uttered a threat, or have a history of violent behavior, you are affiliated with an activist group known for violence, or as in this case a documented history of suicidal behavior. The key word here is documented. Evidence. Fact based. Something you admitted, were witnessed doing, or that they have other proof of.
The agent has to be able to document a reason and provide evidence to justify it in his decision, which he has to record at the time of denying you. You may not be told the detailed reason, but it is there in your file.
"I didn't like the look of him" is not a reason. "I was having a bad day" is not evidence. "I found an internet post where he expressed an intention to participate in an anti free trade riot, and here it is" is evidence.
This isn't arbitrary they had to have a factual basis to deem you a threat. The example of that women was suicide but the key point is that they had a factual basis for deeming her a threat to herself, it was not arbitrary.
Examples of things that could lead to you being deemed a threat: You uttered a threat, or have a history of violent behavior, you are affiliated with an activist group known for violence, or as in this case a documented history of suicidal behavior. The key word here is documented. Evidence. Fact based. Something you admitted, were witnessed doing, or that they have other proof of.
The agent has to be able to document a reason and provide evidence to justify it in his decision, which he has to record at the time of denying you. You may not be told the detailed reason, but it is there in your file.
"I didn't like the look of him" is not a reason. "I was having a bad day" is not evidence. "I found an internet post where he expressed an intention to participate in an anti free trade riot, and here it is" is evidence.
This isn't arbitrary they had to have a factual basis to deem you a threat. The example of that women was suicide but the key point is that they had a factual basis for deeming her a threat to herself, it was not arbitrary.