-SNIP means that the person cut out a lot of the message they are responding to so the originator of the message will not have to scroll through a lot to see the replies (SNIP - Scissor action). Also, it cuts down on bandwidth, since a lot of the message has been removed. Also, it is just polite to use....

>Please excuse me for jumping in, but I have wondered for so long, now I can not wait any longer: What does SNIP mean? I understand it is an acronym, but for what? (So now I pass??)
>
>>SNIP

-SNIPPPPPEED!!