I say time and place are everything.
IMO, 1 tok yellow walls should be avoided if there is a current countdown. The goal of a countdown should always be to reach that goal as quickly as possible, and a yellow wall of 1 token tips can not only disrupt the flow and chat in a room but also give the false idea that the goal is actually going anywhere and likely stop others from tipping in the process. This is especially detrimental if the countdown is already dragging longer than normal, because a wall of 1 token will take up a lot of time with very little fruit.
However, as long as the tip noise isn't too loud, 1 token yellow walls can be awesome DURING shows to drown out the bloob chatter and keep an uplifting atmosphere. The goal has been reached, there is no longer a time limit and the cock emotes disappear in a flash!
When I'm working towards a show, I want to remove chunks from that number in my topic while still enjoying the company and chat of my friends. When I'm IN a show the tip noise for ANY amount is super exciting and encouraging!
Now this is only my thought on 1 token yellow walls, because I can't think of many times it didn't actually hurt me during a countdown. I know that's not the intention at all, actually the opposite, so I hope this thread might be enlightening. Yellow walls of 5, 10, 20, especially where lots of people are involved however are always awesome.
Not many people want to join in on 1 token yellow walls because a lot of members also don't care for them.