Transcript for Crossing the Line: A Look at Sexual Harassment in Online Dating
All right. Now to those dating dangers, you can face them online. Millions using apps to find love but many women are becoming targets of sexual harassment. ABC's Rebecca Jarvis is here with more on our new series crossing the line. And good morning, Rebecca. Good morning, Michael. Well, more than 91 million people are using dating apps for companionship but many of them say they've been sexually harassed. Even the CEO of interiter recently admitted there is a bad behavior problem on his site and the company is working on tools to fix it. Here's how some women are fighting back. Online dating apps have changed the way we date. But these apps have also transformed the world of sexual harassment. This whole concept of those people are too sensitive. I think people aren't sensitive enough. Reporter: Take a look at some of these real images sent to women online. Vulgar messages ranking from you look doable to the more aggressive, I want to get you de dentally pregnant. And others too obscene to repeat. And when guys are rejected, the vulgarity continues. Slut says one and you could be a model if you lost a little weight, sweetheart. Do you think sexual harassment on dating apps has become the norm. I think it's become an unhealthy part of the dating app world. Reporter: 29-year-old Alexandra tweeten says she received dozens of harassing messages while using dating apps. Sexist and hateful and, yeah, that really surprised me. Reporter: So she decided to fight back. Creating this Instagram page, bye Felipe publicly shaming harassing suitors and even started a petition on change.org to stop harassing messages and pictures on social media. Not every man harasses women but every woman you know has been harassed at some point. Reporter: In August this post on Twitter went viral after a young woman publicly showed how even a picture of her headphones sparked lewd sexual advances. One man's response, you wearing those and nothing else, that would be heaven. This is an assault of the person who is getting the comments. This is really the fault of the person who is sending the comments. Reporter: According to the pew research center 42% of women who online date have been harassed and while online, 26% of young women say they experience stalking and 25% are targets of online sexual harassment. What's the spillover effect of this kind of behavior in these types of interactions in real life? You feel afraid. You feel that you can't go out into the cyberworld without being harmed. Definitely think anonymity probably adds to some people just posting whatever they want to post but what should someone do if you get these. You can speak out to the offender. Tell them to top in no uncertain terms and block them. I think as these websites are businesses, you have to think of yourself as a customer, a consumer. You tell the website what's going on. You speak out. You talk about the fact that this is going on or you even consider stop using the website because ultimately that's going to hit them at their bottom line. That's going to have the biggest impact for the business. Bottom line has the biggest impact every time. Thank you, Rebecca. We appreciate that and now let's
This transcript has been automatically generated and may not be 100% accurate.