Since traffic to and from internet sites is easily traced, you may consider running your scans through alternate connection paths. Some examples of this are:
- Tor network, using the proxy chains package
- Virtual Private Network (VPN)
- SSH tunneling
- 3rd party VPN services
- Anonymizing proxies
Each of these come with their own benefits and risks, so consider the best balance of performance, ease of use, and accuracy of results when considering one of these options.