Hi Leon!
The actual name of the driver is Wanpipe,
wanrouter is the script we run to start, stop, etc... it...
re: https://wiki.freepbx.org/display/PC/Card+Driver-+Commands
It is a Sangoma telephony card hardware specific driver... It can actually do more than DAHDI but with FreePBX/Asterisk it's a driver we must load in addition to DAHDI...
We use it with cards such as these:
I don't think there is much risk if you don't have any DAHDI hardware but as the MTA gals/guys say "Your server, your rules"... 
(At one point in time I was really into mail servers (ie MTAs)...)
Good luck and have a nice day!
Nick