Yes, there should be laws regulating the sale, import and export of these technologies. Should they be banned completely? We see in this study that there may be rare cases when the public interest would make the use of such technology by the state permissible, but definitely there should be laws around sales, import and export.
By the way, while I can see compelling grounds for the government, the state and the police to use this type of technology exceptionally with judicial authorization, I cannot really see any compelling reason that someone in the private sector should be able to use this technology. Maybe I don't have sufficient imagination, but I cannot see any compelling reason the private sector should be able to use it.