In what appears to be a case of Tumblr Social justice, a woman named Victoria Doran attacked anti-choice activists exercising their rights under the U.S. Constitution to spread their woefully misguided and anti-woman views. Doran was later apparently charged with a crime and ordered to pay restitution.
Transgender activists also engage in this tactic, most recently at a pro-choice march in Australia where a radical feminist was attacked for her understanding of human biology.
We support the right of anti-choice activists to exercise their rights under the U.S. Constitution. The answer to speech with which you disagree is more speech – not assaulting people and trashing their belongings.