I'm not saying that they haven't, and I'm not privy to all the details of the various cases that would have arisen. My concern is not that CSIS, as they develop sources and penetrate different terrorist groups, may from time to time seize the opportunity to disrupt, which is in the public interest so long as it's not law-breaking or violating charter rights.
There's no problem with that except that we should always be keeping in mind that the goal with terrorist cases is to bring criminal convictions, and that real problems can come up with CSIS secret intelligence and CSIS activities in disruption, which may impede the effectiveness of achieving that.