How to tell if your neighbors are stealing your Wi-Fi

How to tell if your neighbors are stealing your Wi-Fi:

The first sign that your Wi-Fi network has been compromised will probably be a general decrease in internet speeds. The more people connected to your network, the more problems you will have loading webpages or streaming videos

If you notice anything strange happening on your network, you must investigate. The first thing to check will be the Wi-Fi router itself.