That fork is so burly looking that I seriously doubt a couple of riv-nuts would compromise it to any sort of degree that could lead to an issue of any sort.

For most other forks I'd totally agree about not wanting to drill into the legs. But this fork is clearly intended for some semi serious urban jumping. A couple of riv-nuts to set it up for touring isn't going to compromise the ability to withstand a few potholes or or a few mis timed curb hops.