I have the sharing problem with MYSELF! I do some scrapbookking, glass etching, writing and now quilting! Can't get the dust from the glass etching (I use electric dremil tool) into the fabric, so I moved all but the quilting to our downstairs den.
I also share the office/computer room with my husband. He knows to leave my area alone and I do my best to ignore his mess ( I mean stuff) in the computer room. From time to time his stuff gets into my area, but I just pick it up, place it on his computer CHAIR and get on with what I was doing.
Good luck.