I made a tiny addon that simply announces if you have successfully interrupted something. I got sick of the text spams of macro-only people when they're pressing the button, hence the name.

This addon was inspired by several other addons of the same functionality which all were somehow missing something I personally wanted to add.

In the configuration you can define where it shall transmit your message.
Possible targets are yourself, party, raid, and say. They are not exclusive, so if you check all, you send out 3 messages (party or raid are exclusive and only work if you are in a party or raid).

Furthermore you can define if you want to display the target and/or the spell you interrupted.
You can have it say "Interrupted" only, or "Interrupted Karja", or even "Interrupted Pwnspell of Karja", or only "Interrupted Pwnspell". Depends on what you checked in the options.
With version v1.4a it has the additional option tp compact the text if both the target and the spellname shall be displayed. The message then changes from "Interrupted Pwnspell of Karja" to "Interrupted Karja's Pwnspell".

All configuration is done via ingame configuration menu "Interface" -> "AddOns" tab -> "InterruptNoSpam".

With 1.5 it also supports pet interrupts.