It's more people complaining about unforeseen possible use cases that are now seen and possible rather than the underlying bits of tech that make it possible. (What, should we make cameras illegal?) But because aspects of our law have a tradition of "if it's not explicitly illegal, it's legal, unless you get sued for it and the judges decide it's illegal" then it is not a bad idea to nip these sorts of unintended purposes in the bud with an explicit law before someone actually does it and we have to wait for a long court battle for it to be resolved. (And when that someone is the government, the odds aren't exactly 50-50.)