Worth noting is that a number of US states also have strong protection laws. So, delete you comments manually and then, if you're really trying to ensure that they delete your data, submit a data removal request that cites your locale's law on data removal.
Theeeeeen in 6 months or so, send a data retrieval request to make sure they followed through... and report them if they did not comply. Might as well make them pay for that data if they can't follow the rules.