Which cops will absolutely be doing. After all, if the arrestee refuses, the cops can just beat them up a little more and claim they were also resisting arrest.

If the cop drags the arrestee toward you, you can walk backward keeping the 8 foot distance.

If they keep following you around, this will make for a pretty interesting video that's almost certain to get some wide sharing if you post it online.

Oh my sweet summer child. That just gives them an even better excuse to detain you. Now you're acting suspiciously and running away from the police.

Either you're being detained, in which case the law says you're allowed to record your own detainment, or you're not being detained, in which case you're allowed to walk away. In no case does this law give the police an extra reason to detain you if you walk away while they walk toward you.

If police are going to make up something bogus like arresting you because you're giving them space, they can do that regardless of this new law. This new law doesn't make it worse.