I sense a mocking and even a condescending tone in some of the replies here...
Who are we and what status have we received to pick up these sorts of attitudes and belch them out at others?
We don't what is making these sisters dress or act the way they do..it can be ignorance..it can be peer pressure..it can be misunderstanding of the deen..it can be lack of advice from parents and other Muslims..it can be fear..it can be youth..it can be a weak sense of individuality..it can be a lot of things brothers and sisters!
Until each one of us knows *exactly why* these sisters do what they do (even if it's *haram*)..we can't even begin *advising* them..because as Muslims we are to enjoin the good and forbid the evil through certainty of what lays before us not through *mental conceptions* or *personal judgments*..and with that certainty we must utilize utmost wisdom and kindness (I won't even tap into how we need to begin a process of correction for *ourselves* looong before others..I think this concept should be drilled into our minds already)..
Allah (swt) says in the Qura'an:
"Invite to the Way of your Lord with wisdom and fair preaching, and argue with them in a way that is better. Truly, your Lord knows best who has gone astray from His Path, and He is the Best Aware of those who are guided." [An-Nahl 16:125]
Mocking others..and even belittling them..despite how illogical or irrational they may sound or seem..will not get either side *anywhere*..the one advising will remain worried and aggravated by the lack of progress they wish to make..and the one being advised will develop a detestation and a stubbornness towards any words uttered to them as a "piece of advice"
So brothers and sisters..please let us all stick to fair preaching and arguing in a way that is better and stay away from mockery and detailing the faults of those we want to be guided..in these times of trials and fitnah..we cannot afford being held accountable for more faults and we certainly don't want to lose more brothers and sisters to the sticky webs of shaitan