Just join a P2P Pool node or start your own node.
P2Pool does not appear to be a solution to the mining pool centralization problem. Almost no one uses it. Maybe if mining pools prove untrustworthy it will be used after that. Still I think my question deserves an answer. If the answer is yes I think it would be quite important.
It's not about trust--I don't see coinmine.pl ever trying to attack the network. That would be dumb. What I do fear is the possibility of a hacker briefly taking control of coinmine.pl (and/or others). I think it's been pretty effectively demonstrated that nobody is safe from hackers--not Target, not Heartland Payment Systems, not the federal government. Nobody.
I actually think it has a lot to do with trust. Isn't that why miners choose one pool over another? They trust that the payout will be consistently good, that the operator is acting in the best interests of their coin/network, and especially the fact that the pool won't "get hacked."
The word "hacker" is only used to describe internal events to the outside world as an excuse for incompetence. Like you said, the size of the organization is irrelevant -- it is all Gox! It doesnt matter whether the attack/theft/whatever supposedly came from malicious parties within the organization, the organization itself, or an external 3rd party.
In the end, none of that matters. There are no "hackers" as it is an exercise in futility to classify and justify each and every lapse in security. All that matters is that end-user trust/money (or decentralization, in this case) is compromised.
The blame lies wholly with
A) the users for putting their trust in an untrustworthy organization, and
B) the organization for not doing their due security dilligence to maintain a trustworthy reputation.
The problem is that we've relied so heavily for so long on the regulatory systems in place to protect us that we've forgotten these basic principles of reputation and trust.
So really, a well-intentioned mining pool that actually cares about its investment and continued profitability, won't ever "get hacked."