Thread:Support/Sudden email flood/reply (5)

Ok, so "E-mail me on replies to a thread I am watching" is what you need to disable. Watching a talk automatically watches all threads in it, it's how LQT works; can be considered a bug or a feature, either way you have to go to bugzilla to report it.

Of course, you might just want to unwatch some pages, for instance watching Support is not wise for the majority of users!