You know what sir, peoples like to say alot bad things without even thinking it properly. If i am talking about a custom device here of course i know all these problems better than you.

You said device will get hacked, Please let me know how it will get hacked when you don't even know how it works, what kind of software it will going to use, what kind of security we are going to implement in it,  you will be able to connect it to a pc or not.

Device hacking is different than pc hacking, People can hack a device and change it to whatever they want, but they can not hack other peoples device without touching them.

I'll give you a example: PS3