It might be a low number, but then again this also seems like a initiative that will affect an even smaller number of people and is targeting something where a completely valid alternative exists, that has lower emissions.

It might not be the end it all solution, but there won't be one of those. So measuring it by that standard seems pointless to me.

I'd rather look at things like: Is there an alternative (and if so, what compromises does it make), what are the relative gains, and how easy is it to implement? And banning short distance flights seems to check those marks in my book.