* rand_mac
MAC addresses are constant, which makes you easily trackable when you are associated with e.g. a WLAN network.

Enable =rand_mac@wlan0.timer= to regularily change your MAC address when not connected. Works for Ethernet too!
The chosen MAC address is fully random, meaning, the OUI is randomized too. This might be suspicious to any system monitoring traffic. You can change the OUI to a big manufacturer's one.

Copy:
=rand_mac@.timer= -> =/etc/systemd/system=
=rand_mac@.service= -> =/etc/systemd/system=
=rand_mac.sh= -> =/usr/local/bin/rand_mac=