I think this joke succintly points out the trouble with extreme skepticism - refraining from action and having no sense of urgency.
It is of course easy to scoff at extreme skepticism - and solipsism and relativism. But avoiding them and their consequences is not so easy. And the consequences can be serious sometimes.
What do you suggest are the workable alternatives to extreme skepticism?
By what criteria are those alternatives better than extreme skepticism?
Extreme skepticism is a state of extreme belief.
The ES is making extreme claims about what is possible. The extreme skeptic is making very strong claims about his or her ability to criticise our senses, reasoning, intuition.
It is not as if an ES IS pure doubt. They see the dark room. Then they doubt it. They have a religious belief in their faith in the kind of reasoning they aim at the perception. The reasoning that raises other possibilities.
To be polemical: everyone by the way they live is taking an absolute stand - including their mental justification processes. Their actions (and words) are making an absolute claim to knowledge.
Epistomologically: an agnostic is not simply less extreme then an athiest or a theist. The agnostic has very specific criteria about what can be known and what cannot, the value of experience, perception, reasoning and so on.
We cannot avoid being a specific form of life and one whose choices may be mistakes.
Or to put this another way. Sometimes reading your posts it is as if you are outside asking for help about where to step into the world and what it would be best to belief there.
But there is no outside. And there is no stance that is not extreme in its way. Even one foot outside is a stance with claims about how much participation or belief is healthy.
On the other hand I also agree with Baron Max to a degree.
Or better put:I think he has summed up his extreme philosophy very well. It has a certain panache. I doubt it will be satisfying for you. But I think a more reasoned defense of his position would actually be misleading. 'I know what I know: moderation is the key, boy." An extreme claim right there.
I realize I did not answer your question but I felt like the question was coming perhaps from a misunderstanding of what an ES is actually doing. It is just another person with a mode of life that is absolute. The ES is as sure of his or her beliefs and Pat Robertson is. The primary focus of the beliefs is a little different (and perhaps this speaks to the ES's psychology - what their absolute beliefs allow them to avoid).
And there is no 'we' who needs to avoid this. Most people would not even consider extreme skepticism.
What is the attraction of it for you?
What is repulsive about it for you?
I don't think there is an objective rational reason not to be an ES. I made some case above that there are contradictions in it, but I doubt pointing out those contradictions is going to dissuade someone from it. We would just end up having a long, complicated discussion - and one where I might very well make an ass of myself.