Sometimes people want something without negative side effects. However, the side effects do occur, and so the person has to choose and weigh the pros and cons.
For example, people in general want to dress and act how they want. But sometimes this results in loss of respect and dignity. And so we need to choose.
Here's something that's common. On a certain you tube video that I saw, a lady was dressed provocatively and singing provocatively, and then a commenter made a very inappropriate comment towards her. Of course, it doesn't happen all the time to people, just sometimes. But still, we need to think to ourselves, how do we want to be seen? As objects or as people? It's nice to do what we want and have fun, but not at the expense of our respect and dignity.
However, it's Not an all or nothing thing. I also saw a video where a lady was dressed modestly and singing beautifully.
Of course, there might be a situation where a person does her part to be modest and someone still says something rude to her. In that case though, maybe the guy has issues, in which she should stay away from that person.
When we dress and act modestly, people concentrate on us and our inner beauty. We are people and deserve to be seen that way.
Here's a good article by Wendy Shalit on the topic.