I agree with Arxyrl, big sig will take up all attention and as someone else whos name has slipt my mind said earlier; it takes time to scroll past sigs, if they were bigger it would take more time, and i only have infinite time when i cheat.
Besides, some people may have small sigs so making them bigger would cause them to pixelate and i hate it when pictures pixelate, my sight is bad enough already. The restriction is there for benefit.
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