On the face of it, what you'all said looks appropriate for someone being careful, (*) but I would like to know a legal answer to the OP's question.
Is it a problem to posess hacked firmware, or a receiver that has hacked firmware on it?
Of the receivers I bought on eBay, about half of them came with dubious features. I do a factory reset and blind scan (Free) or enter FTA TP's by hand. What evidence is there that I have used the receivers to view scrambled content? Furthermore. by the time I took posession of the receivers, the firmware was already obsolete.
The firmware revision dates are a couple of years old. Given that, there is no way they could be or have been used to access protected content during the time I owned them. So then, what would be the infraction or legal claim?
DMCA?
Fine print...
* But, is that level of being careful enough to avoid trouble like D* used during their inquisition of smart card reader/writer owners? EG, You get a claim saying that because you posess a generic FTA box, you are being sued. Otherwise, you could pay a settlement of $3500.