I still dont see where the disrespect comes from if the word is written out
http://judaism.about.com/od/judaismbasics/a/Why-Do-Some-Jews-Spell-God-G-D.htm
From the link:
The custom of substituting the word “God” with G-d in English is based on the traditional practice in Jewish law of giving God’s Hebrew name a high degree of respect and reverence. When written or printed, God’s Hebrew name (and many of the stand in names used to refer to God) cannot be erased or destroyed. ...
There is no prohibition in Jewish law against writing out or erasing the word “God” in English. However, many Jews have afforded the word “God” with the same level of respect as the Hebrew equivalents. Because of this, many Jews substitute “God with G-d so that they can erase or dispose of the writing without showing disrespect to God...
The Ancient Name of God: The Hebrew name for God, YHWH (in Hebrew spelled yud-hay-vav-hay), is never pronounced out loud in Judaism. When it appears in Jewish scripture or liturgy, the reader substitutes the Hebrew word “adonai” which means “my lord” or often just “the Lord.” Any book that contains this name written in Hebrew is treated with reverence. The name is never destroyed, erased, or effaced and any books or writings containing the name cannot be thrown away according to Jewish law...