packaging

Just received new VOSTRO 3030 tower today.  When I put my hand in the handhold to pick it up I could feel plastic and metal.  I thought that was odd because usually there is some type of wrapper around a new computer (usually a foam wrapper).  I opened the box to check it and yes the rear of the computer where the fan, etc. are, were open to air, dust, the delivery guy, etc.  I don't know if cockroaches haven't climbed in there.    Has anybody else noticed this?  I haven't connected the computer yet, it will be a few days.  It might be okay, but what if there is dirt and stuff in there that affects the performance or lifetime of the computer?