This is true Giz.

We had one member who was crying for help, being bombarded with notifications. I reset her prefs:
- By default should anything added to your Watch Lists be emailed to you? 'No'
- Do you want to be notified via email when you receive a private message? 'No'

..so was a little surprised when she hollered again that it didn't fix anything and she was still being bombarded with everything under the sun.

It turned out that under Watch Lists, she had our Main forum with highest traffic ticked 'yes' as Watched, with Email Notification set to 'Where a new post is created'. Yikes. I was semi-surprised that her main prefs didn't override this. (7.5.4.2) Learn something new everyday!

I'd find it incredibly annoying to have the default set to on and much prefer having to opt in. (Personally, I only opt in when there is a topic that I suspect might go south and want/need to keep a closer eye on.)

Interesting discussion Bert, different strokes I guess!