You can use your hosts file to redirect all traffic in a local black hole (namely 0.0.0.0)

sudo vi /etc/hosts

Add the following lines (plus hosts you find out by yourself) to /etc/hosts and save it:

0.0.0.0 google-analytics.com
0.0.0.0 www.google-analytics.com
0.0.0.0 googletagmanager.com
0.0.0.0 www.googletagmanager.com
0.0.0.0 hn.inspectlet.com
0.0.0.0 api.segment.io

if you check the network tab in your browser, you will see something like this: