sorry to hear but I imagine this is one of the most practiced sort of things as there is to be found on the net.
The only way to avoid it is to get a domain that is so far out of the ordinary and so easy to NOT mistake/mispell – like GoDaddy.com – it took me a while to appreciate that chosen domain but now I think it was genius.
I ask you to accidently mispell or mistake that domain for any other in their niche.
…. I wonder if gosister is taken?
I guess there is one other way; buy up all the potential mispellings and possible names that could be mistaken for your domain.
Looking at your domain : Yours is out of the ord but it has the slashes in it. We have something in common, I have a couple of domains with “-” in them and its nearly impossible to avoid people targeting your domain.
I bet somebody has listobonus.com . Have you looked?