As long as people understand what's a safe level of contamination. There was a problem in New Zealand a few years ago when somebody misread a document describin

As long as people understand what's a safe level of contamination. There was a problem in New Zealand a few years ago when somebody misread a document describing the level of meth residue that should remain after cleaning up a meth lab and as a result, a whole little meth testing industry popped up and people were selling their houses cheap because of very light contamination being detected. Even an elderly lady in a state house was kicked out because her grandson had smoked meth while visiting. Turned out, that threshold was much lower than the actual safe level for the initial contamination and all these people were screwed over.