Actually we had a need for those RFCs the last 2 weeks. A remote site in Gamgadi, Mugu was off-line for 2 weeks. The first week was town hydro power plant maintenance - no power all week and the Telecoms does not have enough solar, so no phones or internet. The second week was some internet "maintenance" thing. They had phones but no data services. It came back up yesterday.
If pfSense at least implemented RFC 1149 then we could have used an RFC 1149 backup link to get some data throughput. And with RFC 2549 we could have even given Sykpe messaging priority.
Maybe I should work on the code for it, if someone can do the hardware design of the necessary electronics<->pigeon adapters.