Many people in different countries have to pay for local phone calls. This means a lot of people are paying by the k for downloading. Another thing to consider is that if you post to the list 5 times per day and you have the same sig file each time you post just how many times per month is everybody reading the same sig file. One should also take into consideration that most email lists have their own sig file that is at the bottom of each post. Good netiquette for sig files is 5 lines or less.
Spaces count as lines.
Sometimes in order to see we must close our eyes and listen. We on the PWA list have found a great way to make use of a sig file when doing site critiques. In this case more than 5 lines would be permissible as you are including information about your PC or Mac, OS, and browser information. Mac OS 8.6 Net Commi 4.5 millions and 256 colors 1024 by 768 and 640 by 480 resolution PC and Mac gamma. This is a great way to utilize the sig file and provides the webcrafter with information about how their site looks on different systems.