To promote someone use the command /op. This gives them operator privileges to commands such as /gamemode.
what I meant to ask was can someone invite me to minecraft realms
Steve was not a random name but a memory of someone in Minecraft.
ask them
No. No one will hack an minecraft server because someone wants to take revenge.
Check the Minecraft Wiki. It has information there.
you cant
Nope, just means your ports for minecraft are open, and someone has your ip.
ask nicely in the minecraft forums and you might get lucky
report them to an official of minecraft and change your password
No. You can suggest it on the Minecraft Forums and someone might make a mod of it.
No one makes their Minecraft password publicly available or someone could easily hack their account.
Nope.