you take a file and just dull from about the effective edge down to the tip and tail. just leave them sharp as fuck and you will find out what the advantage is. no but it just helps preventing yyou from catching an edge adn what not.
Filing down your edges is a good idea and while you are at it file down everything. I have found the perfect way to do it that easy. There's a school by my house with 8 flights of 15 stairs so I go on over there whenever it snows and I need a good detuning and ski those a couple times. After that I have no problems and slide wherever I want to without catching an edge.
do not detune the whole edge...... just set a deeper beval(sp) like 2 degrees instead of one that way u dont kill all mountain performance and can still slide rails with ease