Unfortunately, I think reporting Mapillary errors one at a time is a futile task. There are just so so many errors with sign and feature detection that it would need a much much larger retraining and improvement effort. We are talking millions and millions of samples and images.
Admittedly, it’s hilarious to see the same sign duplicated 25 times:
I mean, pretty much anything can be detected as a bench:
Anyway, I’m just noting that most of us (probably) pretty much don’t bother reporting these, since you can open the map pretty much anywhere and find errors shortly.