Topic: Mentioned Notes and Reposts
When referencing notes, clients should be mindful to not interpret any "e" tag as a reply. For example, if there is a reference to an "e" tag in the content: #\[0] then this is not a reply, but a mention.
If there is a single event mentioned, clients may interpret this as a Mentioned Note, aka "Quote Retweet".
#[2] pointed out that this implies you could implement "retweets" simply by setting the content to '#\[0]', referencing a single note.