Pashuteh Yid,
an asifa against throwing acid will accomplish absolutely nothing. An asifa will help people who want to do the right thing and don’t realize they are straying. They will listen if rabbonim tell them to change. The acid throwers and other kooks in RBS are hooligans. They will not listen to to anyone who tells them their actions are wrong.
FYI – I saw in last week’s Yated that the Toldos Aharon rebbe from Meah Shearim spoke out against those hooligans recently. He said that Reb Amram Blau’s kana’us and protests came from his yiras shomayim and ahavas yisroel. It hurt him to see other yidden doing an aveirah and therefore he felt the need to protest – lshem shomayim. However, he said that today’s protesters’ actions are derived from bad middos, not ahavas yisroel or yoras shomayim.