Roblox has robust parental controls, including blocking all forms of chat entirely. If parents fail to use them, as is nearly always the case in modern cases where children are chatting with predators, that’s on the parents. There literally isn’t a solution that isn’t either require an id to access online services, which is a no go in any intelligent society, or disabled chat on any game that a child could reasonably access, which would kill online gaming entirely.
You can, you just kinda hope to not hit a thermal or strong winds. You have weighted balasts on all sides of the basket, by changing the weight distribution you can influence the direction of the floating. Influence, not fully control; iirc as long as wind is less than 5mph opposed to the direction you want to go, you’ll be able to pick up speed in that direction.