WHAT IS LIST APP COMMENT PROTOCOL

in which i overthink things! classic!
  1. can you comment on somebody's list if you didn't follow them
  2. what about if they don't follow you
  3. do you tag the person
  4. what about replying to comments
  5. is it rude not to reply to comments if you can't think of anything to say
  6. since you can't edit comments how super awkward is it if you have to delete your comment because of a typo
  7. how about if you delete your comment because you just didn't like it that much after reading it
  8. in each of the two above cases, should you replace the comment with the edited version or leave it be
  9. feel free to comment below!
    I won't know how to respond!