@grrrr_shark Ah, I see.
I was at least once in a position where I was considering e-mailing an admin of an (non-single-user though) instance asking them to reconsider blocking mine. In the end I decided against doing so, because I find it hard to write things in a way that won't be in practice misinterpreted in such situations (I end up writing things that are literally correct and terse, which sadly end up being read quickly, which causes them to be misread; I feel very bad being verbose because it feels like I'm wasting someone's time then).