Can i actually remove one author from my research ? If yes, how so?

No .

Then what to do with ppl who spam maps in a section where the map does not actually belong? I like to have only the style i play in my list so i can dl everything and play later, some dude still put random maps in here, telling them only resulted in butthurt reactions so i cant do anything ... And the admins on the site are pretty inactive (they have a life, i know, not blaming them.).

You can report the map for invalid provided track information, I suppose. Short-term that's at least an option.

oh didn't know that, thanks , i'm afraid i will spam a bit though since there are a lot of those maps, still better than nothing !