Pretty sure he can, Bepis made a satirical statement regarding this in his sig
GBAtemp.net - The Independent Video Game Community
Ricken
Jacklack3
I was talking about any member, also I know that the answer is most very likely yes but i'm just wonderin'.
Jacklack3
Oh wait I mean't no, lmao.
BORTZ
The new signature limit takes care of everything.
Jacklack3
I see. Would it do it anyways? And if it were just humans doing it themselves would you?
BORTZ
Yes, as its outside of the rules.
Jacklack3
Even if it is one small tiny pixel?
BORTZ
Yes? What, do you think that just because it is a tiny infraction on the rules it is ok?
Jacklack3
No, I was just curious. Huh, I mean, a bit strict but since it would just be one pixel that doesn't really matter lol. Thanks for the answer though! 
Jacklack3
(I mean in a way where the pixel being removed wouldn't be a big outrage.)
BORTZ
I mean I would just remove the whole thing. It would be up to the member to adjust the signature image.
Jacklack3
True, could you make it so it just resizes it? Or does it already do that?