You're taking a risk when you do this. Not many people go after these types of scans, but you're basically doing it without permission. It's a grey area, be car

You're taking a risk when you do this. Not many people go after these types of scans, but you're basically doing it without permission. It's a grey area, be careful. If your scans cause an issue for the server, either through slowing the system down, or causing a web server to crash, you've now broken a law.