Do you think it's worse to attack someone weaker than you or someone stronger than you?

EDIT 1: Since people are CLEARLY not understanding the point of my question, I'll TRY to help clarify things.

EDIT 2: I'm NOT saying you should go out and attack people. I'm referring more to the type of people who get into fights to begin with. Like someone you know or a completely random person on a video on the internet or whatever.

EDIT 3: Assume both people are completely unarmed.

EDIT 4: This is supposed to be a poll with two equally shitty options, yet one being slightly worse than the other. Like "would you rather get kicked in the stomach or punched in the stomach." Both suck a lot but one is worse than the other depending on who you ask.

EDIT 5: Hope everyone gets it now...not sure how I can be any more specific.

I see people say this all the time in reference to fights.

If the person attacks someone weaker they'll be like: "Wow. Look at that asshole attacking someone two times smaller than he is. What a coward. Go pick on someone your own size."

HOWEVER. If the person attacks someone STRONGER they'll also be like: "Fucking idiot. What the hell did he think was gonna happen? Attacking someone two times bigger than him. He deserved that ass beating."

So basically the moral of this story is to attack someone who is similarly as strong as you rather than someone weaker or someone stronger.

But of the two extremes which is worse?