the same question applies to the manufacturers of telephones that some people use to speak loshon hora or other d’vorim assurim.
The answer is – that it depends if they get s’char for the good that these devices can do. If there is good such as kiruv.com or aish.com or any of the other myriad of Torah websites, tyhen they should ghet s’char and converswely get punished when people use them for negative things. Personally I think that they get neither s’char nor onesh for selling / manufacturing a neutral device.
These devices were created neutral, neither good nor bad. If individual people use them for good for harbotzas torah or parnossah then it’s good. If other people succumb to their yetzer hora, why is the manufacturer or seller liable?
It is incumbent upon every individual to accept personal responsibility for their actions. If your yetzer hora is strong in these areas then distance yourself and educate yourself about the necessary safeguards. Actually that’s true for everyone.
It is incumbent upon our chachomim and yeshivos to educate the next generation on how to deal with these terrible nisyonos. Burying one’s head in the sand is denial. The internet is here and it’s here to stay. We have to find a way to deal with it.