Carol Rohan Beyts, 62, was charged in April 2016 for urinating on the Aberdeenshire course under a Scottish law that fines people for urinating or defecating "in such circumstances as to cause, or to be likely to cause, annoyance to any other person".
"Rohan Beyts is a shameless activist with a history of antagonistic behavior", the golf course said in a statement, adding that the suit was "nothing more than a poor attempt at self-publicity in an effort to garner support for her anti-Trump, anti-business propaganda".
She said she was being treated for urinary incontinence and "needed urgently to go to the toilet" after jumping over a burn.
The court heard she had been using a recognised right of way, and had been careful to observe Scotland's countryside access code.
Three days after the incident, two police officers visited Beyts at her home in Montrose and arrested her for public urination. "I was also upset [because] I had had a conversation, possibly with the men who had filmed me afterwards and not a word was mentioned to me".
A verdict is due later today.
She alleges that the golf's employees violated data protection laws by secretly filming her urinating in sand dunes near the course.
"I found that really disturbing", Ms Beyts, said.
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He told the court if her claim is upheld "the consequences are serious for the prevention of crime and the apprehension of offenders" and it had been "reasonable, proportionate and fair" for an employee to take a photograph if he believed a crime had been committed.
Ms Beyts said: "I shouted to Sue something like "I need a private moment" and she said something like "I'll carry on and make sure no one is around".
That case is now before the small claims court in Edinburgh.
But Edward Irvine, 23, said he had not filmed Ms Beyts.
Beyts' lawyer, Mike Dailly, argued that the photos taken by the staff at the Trump golf course of his client urinating were "captured unlawfully". He said those golfers went into bushes before going to the toilet.
He said although she was distressed, there was "no causal connection" between her distress and the firm's failure to register under the Data Protection Act and so her claim for damages failed, but £750 compensation would have been awarded if she had won.
But when she arrived back near the club house, she was confronted by the club's manager and a local paper photographer - although neither said they had photographed her.