I usually stand on public transport so it's never been a problem.
But sometimes, when I take the bus to uni, I sit, given that it's a 50-minute ride, and I usually don't give up my seat there. Especially since I always get the window seat, so the person next to me will have to get up too. And the aisle is narrow, so you have to push and shove. So, all in all, giving up my seat would actually cause more harm than good
