Are you suggesting that when investigating members of a criminal organization, they should be notified? It seems pretty reasonable for there to be cases where making a target aware of investigation would be detrimental to proving the illegal activity they are currently engaged in but would likely discontinue if literally told “we are monitoring you specifically now”.
Yes, but the warrant should be revealed eventually. Worst case, if you can't prove or disprove someone committed a crime after X time, you should alert them to discourage future crime (they may have already done more crimes during X time; besides public interest, it also forces you to cut your losses when the alternative would be to dig a deeper hole).
Do these warrants have a fixed maximum duration of secrecy?
the problem is that in democracies anybody can be dubbed 'criminal organization'. Today you're pro-life? criminal organization. Tomorrow you're pro-choice? 'criminal organization'. You're making protests in your big trucks? Criminal...
What ever happened to hanging around, being a nuisance, and asking them questions? The real problem is cops are scared to cop. A detective used to show up around a place and just make their presence known. That was enough to notify you of investigation prematurely. Now, in the digital surveillance age, they can just sit in the basement eating Cheetos and phone in a SWAT.
This isn't about criminal organizations. One person somewhere can decide to target you, monitor you for 30 years with all the government's resources, and never need to tell you or anyone about it. I don't like that personally.
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.