Thanks for making this point...it needs to be said, and often.
There is a lot of bashing of the federal government these days, with accusations that this-or-that agency is biased or rogue or acting out of base motives. But the fact is that there are checks and balances built into our justice system to keep abuses from happening, or to at least minimize their chances.
Search warrants have to be applied for, with evidence supplied, reviewed by agency supervisors, and then approved by a judge. Indictments are handed down by grand juries, composed of ordinary citizens...prosecutors or government officials don't simply "charge" someone.
Even in civil enforcement actions, when federal inspectors believe there has been a violation of the Code of Federal Regulations, and violators are facing fines rather than criminal convictions, there are protections built into the system, with several layers of approval required before a case is finalized.
I truly wish more Americans understood how well our system of justice works. It's not perfect, of course, but it's a model of respect for the rights of citizens.