it has one, you can also not answer and hide for yourself without leaving a note
and yes, there is also an option to leave a note and it clearly states what will happen
if note is useless then it should be closed, if it keeps happening on larger scale reporting problem on issue tracker is welcome
For example major motivation for Things overlay in StreetComplete was to stop “here is a trash can” notes that were quite useless. Cycleway quest got redesigned to stop flood “no cycleway here” notes and so on.
maybe attaching photos should be pushed harder so notes are more likely to be useful?
(and if someone sees flood of pointless notes from mapper but are scared to close them, you can try sending them to me - I mass closed some such cases)