1.7 BTC is not a small amount and maybe that is the reason why an investigation is going on, although I have friends in stake chat who have withdrawn way higher than that without any problems.
Also since you are new, I suggest you to use the right section of the forum which is Scam Accusations section for posting these kind of reports. But I repeat, please don't even bother creating a thread there unless you have been actually cheated and have enough evidence to back your claims. Every time someone comes with an accusation its stake who comes out true at the end.
So, if anyone has any grievance with stake, they could simple provide proof of scam and start a topic with all of those data to show the world that stake has actually scammed them. It is quite simple really, you provide every detail you have, and you show the world that you have been wronged and people will support you and blame stake for it. But I haven't seen even one single person who could provide proof of such a thing in all these years.