The end of that error message is too funny!
exactly
sad thing is that the future of p2pool depends on other pool operators if they decide to keep it alive or not because fellow miner does not have such power, what an irony?
in origional bitcoin was solo mining the only way to mine and also it was designed to be fair, but with growing difficulty solo mining is no more way to mine and absolutely not fair way, fair way, decentralised mining done thru p2pool was destroyed by its own sofisticated design and greed of node operators (a little less fellow miners than fellow miners)
if p2pool mining mechanism was implemented in core it would still allow fellow miner to grab some coins but the condition to own server and linux ability to tune pypy and compile git bitcoind and and and and ... are not the way interesting enough counter easy pooled mining
Some people have take steps to mitigate that - see OgNasty's and Nonnakip's NastyPoP method. Unfortunately no good, true solution to the problem has been found.
Finally, let's face it: people are not really that interested in running a pool (or node in this case). Maybe they don't have a computer that is on 24 hours a day. Maybe they have limited bandwidth. Maybe they just don't have the technical knowledge and have no desire to learn it.