Any ladies want to stick their necks out and talk about the unmentionable? I, as well as every female who lives in my apartment building, can sadly attest that you speak the truth.
It seems "predatory", but I think it's either mindless "aping" or meant to intimidate. But I know many women who just plain ole don't LIKE it.
If you feel intimidated, some self defense training is a great confidence booster and could save your life. SAS (Second Amendment Sisters) has a great website:
http://www.2asisters.org/