There is a great deal to be concerned about in the exhibitions of infants and young children being used to carry climate placards last Friday, and of older children presumably choosing to carry them aided and abetted by teachers, parent, and others. It is not difficult to find photographs in the news media to illustrate adults posing with infants, and adults urging on older children to perform for the mass media, some carrying placards provided by political groups such as the 'Socialist Workers'.
Note added 19 Feb 2019. Speculation in Germany and elsewhere that Russia is behind recent climate demonstrations by schoolchildren. They were behind such groups as the CND in the 1960s, so it would not surprise me if they were using their agitprop skills to manipulate youngsters and associated useful idiots in order to weaken 'the West'.
(hat-tip GWPF https://mailchi.mp/1f95a254fdb2/german-climate-law-put-off-as-government-splits-deepen )
Note added 20 Feb 2019. Andy Shaw has written a thoughtful, sympathetic essay about the schoolchildren's protests. He also has some ideas on how we can help them:
'I think that we should appeal to positive side of young people protesting. We should appeal to their sense of agency and purpose. Many teenagers are intellectually curious and want to work things out for themselves. Everyone feels the need to fit in, but not necessarily follow the herd.