This is an interesting perspective, because from my point of view, the criminals ceasing their illegal activity would be a "win". Whereas, the alternative is the government knowingly allowing illegal activity to continue as they build their case with the goal of a "big bust" and larger jail sentences.
If their co-conspirators were also to cease, I would agree. But if that were realistically the case, arresting a single person would stop all crime.
Personally, I am rarely concerned about the crime private citizens are committing relative to the crime the government routinely commits. Cumulative historical negative effects are not even close on the two. Also, the vast majority of private crime with broad effects is economically motivated, almost always by laws passed by government making some act people want to do illegal (i.e. drugs, prostitution, gambling) and the solution that is sensible legalization with a focus on making it too inexpensive to be illegally profitable in the context of ensuring product safety (yes, I am aware Canada has already utterly failed at this with marijuana). The solution to those crimes is not more government surveillance and therefore more data to assist the government in doing the crime its representatives appear to be fond of.