http://zqktlw5bf6oycxq6qod452xnvdfcqhfwliz54bkul736g6b454jrk2ad.onion/wiki/index.php?title=Physical_Interaction
This way, at worst you get rejected immediately, and no harm is done. Note As mentioned previously, make sure not to purchase your printer with a credit card . The EFF maintains an excellent page about printers that encode identifying information in printouts, and how to detect if your unlisted printer is also bugged in this fashion.