Here is the source that you should make noise at the mention of Haman's name. However, as I was listening to the Megillah this year it occurred to me how counterproductive it is as an act of erasing ...
The Shulchan Aruch in Siman 690:17 brings down a minhag klal yisrael to fold the megillah like an iggeres (Esther 9:26,29) when reading from it. The Mishnah Berurah mentions that one should not pause ...
We read Koheles on Succos, Shir HaShirim on Pesach, and Rus on Shavuos, and we always read it prior to Kriyas HaTorah. Then why do we read Megilas Esther on Purim day after Kriyas HaTorah?
In Havdalah, I noticed a virtually universal custom: when the one who is saying Havdalah reaches the Passuk of Layehudim Haytah Orah (ליהודים היתה אורה ושמחה...), those who are being Yotzei Havdalah ...