I keep seeing what these bochrim did being referred to as a chillul Hashem. I cannot see how anybody can say this. These bochrim got rid of a non-tzniyus picture, and stopped it from causing others to do aveiros. They got rid of something that we all agree should not have been there. Something we all agree Hashem does not want there (or anywhere). They stood up for the honor of Hashem. And they showed that we, as frum jews, will always stand up when Hashem and His Torah are disrespected. That’s the quintessential kiddush Hashem in my book.
For all those screaming “dinah di’malchusa dina”, this only applies when the law of the land does not contradict either the letter or the spirit of our Law. Would anybody suggest that if somebody managed to legally put a massive advertisement of naked woman in the middle of BP (or any jewish community), we would have to just let it hang there? No, we would rip it down at all costs!
However, I would like to point out that I do believe kanoi-type actions should only be taken as a last resort. If it was possible to get this picture taken down in a more polite way (ie, talk to the manager) that is what should have been done.