Disable +1 posts notification

I'd like not to receive notification emails when a new post has been made on a feature request i'm following (#4307 for instance) if the so called "post" is just a "+1".

Some people apparently don't get the vote feature and for now serious people have only two options :

• receive tons of junk emails and eventually risk to miss the one you one thinking it's a +1
• stop following the ticket

Could we introduce some kind of "smart" filters to avoid this?