Wait, What...Half Tops!

Ok so I am not here to post about fashion because trust me I am not all that fashionable but more and more I am seeing more and more of people, especially my women friends.  Ok maybe not my friends but women in general.  What is it with half tops?  And then it seems the new thing is lets not wear an undergarment under my half off shirt!  And it is not just half shirts it is half pants, half jeans, and I swear there are some girls wearing high waisted briefs as their shorts.  
Ok so I am not a young woman anymore, and I do not have daughters, but I like to think that as blunt as I am I have some sort of tact and class.  And maybe even a little bit of modesty.  Though I have to admit that after giving birth and then breastfeeding I have lost whatever little modesty I may have had.  BUT I am still not rocking a half top!  And I am not walking around in my underwear only!
I have had many conversations with people at work about the dress code which vague and scary to address in this day and age with the way people are litigious but something has to be done.  The counselors have told me they have had to not only had conversations with students about appropriate dress but that some people should not wear certain things.  Like spandex in the 90's it is a privilege NOT a right and in a school the privilege is NOT there. I do not think moms are buying this stuff for most but they may be and I really do not think they are walking out of the house this way, but come on, where do we draw the line.
Ok soapbox over!  Maybe I will never understand?