Tao. How is this a question
A child who was said to have been beating an army. Not a regular kid.
An army whose strongest fighter, roughly on par with Goku, Tao killed effortlessly. Goku's reputation is still weak enough to stay in the league of fighters he doesn't give a second thought to. The only time he was a little surprised by Goku is when Goku got up after being lightly knocked around. But before that he already could tell Goku was weak asf just by sparring with him.
About recognising Turtle School clothing, idk if Tao even knew who Roshi was. Same for the KHH.
I can see him taking max power Roshi lightly and trying to tank the KHH, but if they fight Roshi might mention he knows Crane and that could get Tao to be more careful. And Roshi knows Tao is very strong, but he doesn't know how strong exactly and probably fights in his normal mode for a while and gets killed or badly hurt before getting to go to max power.
Btw, wtf was the bomb that Tao threw at Goku made of? Goku could block rocket fire when he was much weaker than Tao, but the bomb almost killed Tao.