@Mithical I don't care who it is, signatures are NOT allowed in SE, period.
Feel free to rollback I won't start edit war, but that's my opinion and it would be very upsetting that some people are allowed to have signatures just because they're "hot shot".
Based on your logic SE staff also should add signatures because the "who is this" is useful in all their answers.
@Mithical well the author of the answer says who he is in the beginning of the answer, that's just enough. Really no need for his full resume and projects. Good for him, really awesome, but it's just noise, like any signature.
@ShadowWizardChasingStars I agree that the full signature was a bit much. However, his real name is useful for people to verify that he really is the expert he claims to be. Also, that signature mentioned that he's the author of the APCA accessibility software that he linked to. So now his answer links to his own product without proper attribution. You turned him into a spammer! ;)