I think you are overestimating the skills of the police 'techies', an IP address only ever really identifies a location/ID of a computer and even then they can be spoofed or masked and it doesnt identify a person, to do that you would have to prove a link between a particular person and that IP...
To be charged you would need to be arrested, to be arrested you would need to be identified, does NSC hold that personal information? Its unlikely you would be charged with any offence just for using the word, it would depend on the context of course. Its more likely the site admin would be...