I am bother by this behavior and I feel it should something people learn when they are kids, not something I should ask for.
I think that we can just try to be humans and ask, it's not really a big deal. As I said even eye contact is enough most often, is it so difficult.
There's no need to start a war, leave along a pointless, sexist war like the proponents of the term "manspreading" are doing.
This campaign is teaching people how they should ask, which is much more efficient and effective that asking one person at the time (moreover if you are the only one ask chanses are you will be seen as an unreasonable person on the train).
For the sexiest part I think it's laughable,as they are not suggesting it's a problem with all men, but that is prominent in men, which for my experience it's true. Btw also their claim as "manspreading" being sexiest is laughable in my opinion, but I agree that it should be stopped (and I am a male).