Should these 16-17 year old boys be allowed to accompany their mother or sister in female compartments in local?

As the title suggests, this muslim family (mostly women and kids) with probably 10-12 bunch of people boarded the local train with me towards csmt, with them they had 2 young boys aged 16-17 approximately. Now a few women in train complained to their mother to which she replied and I quote "ye logo ka apna matlab hota hai to unite ho jaate hai, apna matlab ni rehta to merge ho jaate hai", later proceeded to say "ladka ldki ko kiss Krna ho or dekhna ho tb ni ldka ldki krte". TL : "people unite when they have their own means/purpose, and divide when they don't have any means/purpose". " Girls and boys aren't ashamed of kissing and watching kissing scenes, but are complaining about this". I was like what logic is this, I believe they don't pose much threat (PROBABLY), but female compartment is meant for female and them feeling safe. I understand carrying kids under 15 with you but what's with carrying 16-17 year old boys with you. What are your views on this? Should this be allowed?