Popa,
The images were not objectionable in the sense of these bochurim requiring vandalism.
They probably would have spray painted me if they saw me because my Rav follows a much more lenient view on tznius and halacha.
Please tell me how a woman’s calves or face are objectionable. They are not inherently so. (I can’t actually see the necklines so I can’t comment, but one of the women in the ads is wearing a skirt).
They were also cowardly and covered their faces.
Shlishi, R’ Elyashiv protesting the rights of a father to remove his children from a public school is vastly different from allowing vandalism.