Broadband Via Gas Lines?

Called BIG (Broadband in Gas), a company in California (where else?) is pushing this as a last-mile alternative for delivering wireless 10Gbps service using existing gas pipelines. They call themselves "the leading innovator of subterranean broadband communications", and claim they can do this with the pre-existing pipeline infrastructure.

Is it just me, or does pumping radiant energy into a potentially explosive medium seem like a bad idea? Not to mention that jointed cast-iron or PVC pipes seem like less than ideal waveguides.