Gokudera won't be moving his hands enough to hit Yamamoto unless he's standing too close. In fact, he's less dangerous since he'll just be waving about his hands and no lit cigarettes. The hands are so much a part of how he speaks, the dodging requirements have to be high for anyone in close proximity.

He wouldn't like if anyone did anything to support him. Gokudera's expectation is that everyone is selfish to varying degrees. The Tenth has enough on his plate, the baseball idiot has a carefree life, and really... the one person he could relate to best is Chrome, though she wouldn't be safe to approach considering the company she keeps. At least she's safe. It is more than enough to have friends and family to support should he need it, but they're all relatively capable of staying out of his business. Sometimes.

"If we all have to and you don't, it won't look good on the family." Loosening it is something he'd expect. Going without it is blasphemy. "Wearing a suit without a tie is like wearing your baseball uniform and no shoes."