Is it OK to add user types to topics just so freebase suggest works better on my own site?

I'm building an application which auto-completes against Freebase (using Freebase Suggest) to allow users to pick species (well, things typed with /biology/organism_classification). I want to encourage my users to select species that have already been selected on my site - so ideally I want already selected species to show up higher on the freebase suggest list. I've found a potential solution: I've invented my own user type ( http://www.freebase.com/view/user/simonw/default_domain/wlny_known_species ) which I could apply to a species the first time a user on my own site selects them. I believe (though I have not yet confirmed) that this will allow me to bias the freebase suggest search results using a query that looks like this: $('input.species-select').suggest({ "type": ["/biology/organism_classification", "/user/simonw/default_domain/wlny_known_species"], }) My question then: is this an appropriate way of using user types? I'm concerned that this kind of usage "pollutes" Freebase - is it OK for me to be doing this kind of thing? Or is there a better, different approach to achieving what I want to do.