Email notifications to follow subjects would be nice

open your eyes and try find it on this page.

I mean, would it be possible on auto-enable it in the profile for every subject where a user writes a message ?

i don't think that it is good idea )

Even as an option disabled by default ?

Many forums use this system to keep members aware of answers.

i think not hard press link for activate this function in topic...
maybe latter we do this, but this is very trivial task now