It is polite and REMIX ETIQUETTE to comment "Remixing..." in the comments before starting a remix, so people know not to accidentally split the remix tree's branches. If you don't intend to make a new remix branch, then don't remix if someone has commented "Remixing..."! If Scratch thinks you're spamming for saying "Remixing..." too much, just comment "I'm Next." Until the same thing happens, then you can return to commenting "Remixing...".
