while I get that it's a possible harassment vector, it seems only marginally easier than sharing a link or a screenshot of a toot?

something i think properly implemented QTs would add though is that they can re-use the toot-dereference/signing logic a boost has for example, so a remote instance you have blocked still won't be able to quote toot you, or see the toot a qt is referring too (because it always has to contact your instance for the content, and it'll just say no