Yes, pretty much the Canadian patriot act.
I did a quick read of the bill's wikipedia page, and it is almost nightmare fuel o_o. I'll quote the site for this:
Part one enacts the Security of Canada Information Sharing Act, which authorizes the disclosure of information throughout and within the government of Canada regarding activities that “undermine” Canadian security.
Part two enacts the Secure Air Travel Act, which creates listing mechanisms and prohibitions for persons who may pose a threat to air transportation or who may travel abroad to commit terrorism offences.
Part three makes significant amendments to the Criminal Code including criminalization of the expression of ideas related to terrorism.
Part four expands the mandate of CSIS to operate both inside and outside of Canada (also in conjunction with Bill C-44) and to operate in a more active manner, as opposed to its previously passive information collection role, and also allows the agency to conduct illegal activities with judicial approval.
Part five relates to amendments to immigration security certificate legislation allowing, in part, the government to withhold information from the specially appointed, national security approved Special Advocates retained to represent a detained person in confidential and
closed national security hearings.
Pretty much every part have potential for abuse, but I'm mostly concerned about part 3 for it's potential to restrain freedom of speech, and 4 because it allows them to ignore human rights.
Another thing of note is that they can arrest people they suspect "may" commit terrorist acts before they commit any crimes. Combined with their very loose definition of terrorism, this gives them a massive potential for abuse.