In July 2017, Dekker participated in the demonstrations against the 2017 G20 Hamburg summit. The weblog she maintained these days was widely read, and received many negative reactions from Dutch right-wing media such as PowNed, who published a scathing piece entitled "All of Holland Hates Anne Fleur Dekker". Much of the criticism focused on the fact that Dekker reported much Neo-Nazi and 'excessive' police violence against leftist activists, but was silent about leftist violent rioting and vandalism (often referred to as "black bloc" tactics), which she claimed not to have witnessed.