It's not anti social at all, of course - any more than putting on make up or putting products in your hair is - because for the most part people are just doing it for fun and enjoyment and without any realisation that it might be inconvenient to others.
If you were travelling with a friend who knew you didn't like strong perfume and they went ahead and sprayed themselves anyway, that would be unkind.
Not anti social though, since society for the most part is fine with people wearing perfume. It genuinely wouldn't occur to most people to think it was an issue. After all, strong smells are absolutely everywhere.
I don't love strong perfumes or wear heavy scents myself, and don't love it in others, but it is what it is.
And I wouldn't spray myself with duty free perfume because I am very selective about what perfume I wear. I spray myself in the morning before leaving for work and that's it,, but I do reapply deodorant during the day.
However because I had a friend who was sensitive to sprays I do that in an open area, not in the toilet or breakroom or in the office, but in another room just off those rooms where nobody has to breathe it straight in.
But if others are spraying themselves with perfume or deodorant in the office that's just because that's what they do, they're not being anti social, at all.
It's a big wide world filled with people who have all sorts of allergies and conditions and we can't possibly be expected to constantly monitor everyone else's issues.
But it would be selfish of a friend or relative to do this around someone they knew had issues with it.
So, no, of course it's not anti social.
Wearing perfume, even heavy perfume and when travelling, is a commonly accepted practice and most people are fine with it - which is the opposite of anti social.
That might change, over time, if enough people complain, who knows?