No its not bullshit, you have been asked on more than one occasion to stop uploading a signature over the allowed limits.

If you keep uploading oversized signatures then yes, you will be on a ban.

Thankyou.

Here are the rules yet again just in case you are still in any doubt.

Max siggy physical Size: = 550 x 150 pixels
Max siggy Disk size: = 35840 bytes (35k)
Max Avatar size: = 120 x 120 pixels
Max Avatar Disk size: = 5120 bytes (5K)
Max Text size: = All text printed in the signature area must be normal font size.