Phil Surrey, one of the organisers of the gathering, told Express he expected the case to be “draining” and said he had come to witness the legal process.
“I’ve tried to put myself in their shoes and tried to find a victim in this. It must feel dreadful,” said Mr Surrey.
“Now a bunch of blokes in wigs and robes – spending taxpayers’ money – will decide the result.”
He said that “Guernsey is gradually going in the right direction” in relation to cannabis laws and argued that campaigners need “to be positive”.

Pictured: Lucia Pagliarone, far right, who started the Guernsey Drugs Strategy Campaign, arrives at court this morning.
Mr Surrey said the routine labelling of cannabis as a “drug” needs to change.
He argued that other psychoactive substances such as coffee and chocolate should also carry that label and be recognised as “a gateway to other snacks”.
Many of the supporters are watching proceedings from the public gallery of the Royal Court and Mr Surrey said they would stay until a sentence is delivered, possibly later today.
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Campaigners at Court on Monday
You can view a gallery of images from the gathering below: