I lead a small team at work. Outside of work one my team members has been fundraising for Ukraine, and has now booked some leave to travel there, which is obviously against current Foreign Office advice. They want to spend a week talking to people about there lives there, as an act of solidarity, and to add credibility to further fundraising. They have no family connections in Ukraine, but have a history of travelling to unusual locations, including other conflict zones. They will be travelling alone and independently, and they don't speak Ukranian or Russian. They will be spending time in Kyiv and travelling to other areas too, though they were a bit vague about exactly where. I am concerned for their welfare, and considering telling them so, and possibly mentioning it to HR (on the grounds that it is "risky behaviour"). I don't think this will stop them, but if anything happens at least I will know I didn't stand by and do nothing. Aibu?