Not sure why they are warning people about Trigger, I thought he was one of the best characters in the show. Seriously though, it's all a bit daft really:
Many of the episodes have been hit with trigger warnings for racial and 'outdated attitudes'.
'The Russians are Coming' from series one was a fan favourite, but now features a disclaimer that reads: 'Contains some offensive racial language of the time.'
'The Yellow Peril' from the second series and 'Who's A Pretty Boy' from the third also feature a number of warnings.