Refuting frequently appearing bullshit could be made more efficient by having a web page with standard explanations which could be linked from the debate. Posting a link (perhaps with a short summary, which could also be provided on the top of that web page) does not require too much energy.

Which would create another problem, of protecting that web page from bullshit created by reversing stupidity, undiscriminating skepticism, or simply affective death spirals about that web page. (Yes, I'm thinking about RationalWiki.) Maybe we could have multiple anti-bullshit websites, which would sometimes explain using their own words, and sometimes merely by linking to another website's explanation they agree with.