Okay the rules state:
8) Keep your signatures reasonable.
We all love our fish. Some members like to do the digital equivalent of shouting it from the rooftops by using large, colorful signatures. Unfortunately, many members find such signatures distracting, especially when they have to see them again and again. Please be courteous to other members by limiting the number of lines and the size of the text in your signature. Please follow these guidelines:
No more than 8 lines of text if you don't use an image
Text no larger than size 3
No more than 1 image with maximum dimensions of 468 x 60
No more than 2 lines of text if you do use an image
You are welcome to link to your personal blog from your signature. If you do so, please return the favor by linking to our parent site, tropicalfishkeeping.
Okay this is what it said but... whatever. They want to look good, not like a site for kids.