i was writing a book about cool stuff one could build with lego bricks. i wrote to the lego corp to get some guidance about how to use their logos and trademarks in ways they wouldn't object to. like for instance they really don't like it when the bricks are referred to as 'legos' preferring 'lego bricks' for example. the response i got was a threat that if i was going to write such a book that i would have to negotiate a royalty arrangement with them my book project would not go forward. i wrote back explaining that the entire project would not need to even mention lego at all beyond stating that 'lego(tm) or any of the excellent compatible bricks are required for the models in this book'. i never heard back from them, also i have yet to finish the book. this still leaves a bitter taste in my mouth a decade later. all i wanted to do was promote their product but they decided to be jerks.
i can't quite put my finger on why it sounds awkward to me to use 'parasite' as a verb. i poked around on at thesaurus.com and found 'leech' to be a pretty good verb to substitute. perhaps english could adopt a foreign word to fill this niche. any suggestions?