This place is still widely undiscovered, and I'm sure easily moderated if need be. There's always the possibility the site'll get over run with juveniles, but with such a clear cut topic of submissions, it's a slim chance for the foreseeable future.
I put more faith in the fact that PG doesn't need to make money from ever more traffic to the site, so he's free to use hard tactics.
Indeed. Reddit seemed to go downhill when politics went popular. I would hate to see politics here unless it is relevant to hackers/startups in a more direct way (ie for discussion, not arguments).