i wouldn't worry about it coming to your house, it's not like the cops keep track of what's coming to where via the post office. if you've bought it over the net on your cc or debit card and they later have a warrant to see your bank statements and they show up as having bought suspicious things, even then that's only circumstantial evidence as you could've been growing anything... so really i wouldn't worry too much, just don't buy massive quantities of things from a single store because they might flag the cops off, eg 30 x 1000watt hps. that will put up a few red flags...