notes-politics-slipperySlopes

"Slippery slopes legitimately exist wherever a policy not only affects the world directly, but affects people's willingness or ability to oppose future policies. Slippery slopes can sometimes be avoided by establishing a "Schelling fence" - a Schelling point that the various interest groups involved - or yourself across different values and times - make a credible precommitment to defend." -- http://lesswrong.com/lw/ase/schelling_fences_on_slippery_slopes/

Another use of Schelling fence is to lend credibility to a committment to defend something (rather than retreat if attacked) when you are facing an opponent (source: a commentor on the same web page as above).