Yes it's illegal in all states with varying penalties. Also, in some states, mainly the ones you mentioned, it is illegal to sell devices that defeat drug tests but there will be some 3rd party vendors who still sell them but use the guise of saying these items are for religious practices or fetishes or gag gifts/pranks, etc.

If it is for employment, hardly any collector is going to call the polices if they catch you, it's just too much trouble. If it is for probation you can bet your ass the judge will find out. Wouldn't want to be caught by and government child and family service either (custody cases, etc).

The last time I really heard of anyone getting in trouble was some idiot or idiots stopped at a gas station and nuked a whizzinator in their microwave. The way the write about it in the news they make it sound like the whizzinator exploded with such force the microwave flew into the air and landed on the ground. What is closer to actuality is the "bladder" got too hot and the liquid popped it and it went all over the inside of the microwave. They were charged with vandalism or something similar (who wants that microwave now huh) and made stupid criminal news everywhere.

No, these states aren't adding additional tests to look for synthetics. Look at how many people use it and have posted their successes here. It's a game between the labs (you think they don't know about Quick Fix, etc) and the makers of these synthetics as each tries to stay ahead of the other. The markers will update their formulas to stay ahead of the labs when the labs add new tests (across the boards, not just in one state). Creatinine clearance is mainly used to detect dilution but when they started testing for it, Quick Fix updated their formula from 3.0 to 4.0. That's just one example.