@KarenAnn0 - This is a configuration issue with your router and wireless internet that you can easily solve within your own business. This really is not an Airbnb problem since internet access is an amenity that you provide in your home/Airbnb business. Spend some time researching the options you have to disallow downloadable content (including executable files - you don't want anyone downloading a virus either) that's compatible with your system, or call an IT professional, or a parent who has already installed internet controls on their wifi to keep their kids from getting to porn and other sites. You can even write this software or professional help against your business earnings if in the US.
Here's a few articles for you to review: