Seeing all the cancelled and delayed flights, it makes me think a hacking kind of climate activism/radicalism would be more useful than gluing hands to roads, or throwing paint on art.
Activism is mostly about awareness, because generally you believe your position to be the one a logical person will accept if they learn about it, so doing things that get in the news but only gets you a small fine or month in jail are preferred.
Taking destructive action is usually called "ecoterrorism" and isn't really done much anymore.