They're sending requests to websites to
see how they behave, not to
request information.
If you called up companies' sales lines to ask for prices, that's just gathering facts.
If you called up companies' sales lines to see what happens when you ask them for prices for things they don't sell, or to see if they're willing to accept a bribe, or to see if they respond with different prices when you lie to them about who you are, you're researching human behavior.
In this case, they are testing what procedures, if any, companies have in place for handling CCPA and GDPR law, by posing as nonexistent customers and making potentially bogus and misleading requests under the terms of those laws.
This is like performing research on retail refund practices by going into a bunch of shops and seeing how they handle being asked for a refund for an item you didn't buy from there in the first place.
There's a more ethical way to do that study, though, which is to actually buy something from the store first, then go back and try to refund it.
Similarly, there's a more ethical way to discover how websites handle CCPA/GDPR requests, which is to use the website first, and determine in the course of that what possible information about you the website should have; then, within the terms of your rights under CCPA/GDPR, to contact them and make reasonable and legitimate requests to see if/how they are able to handle them.