I'm quite familiar with overly curious protestants. Like the ones in Russia who swindled my wife's great grandmother out of all her belongings on her death bed so they could put one of the local baptist parishioners in her apartment at no cost.
Anyone can represent themselves as a Protestant.
However ... their word alone ... doesn't make it so.
I'm sure that there are some wolves in 'Orthodox' clothing, as well.
Even Jesus had Judas.
I am sorry for the loss to your wife's family.
Indeed on all points.
May The Lord restore 7 times over.
Problem is in Post-Soviet Russia the norm is wolves as far as most protestant groups go. In fact I'd go so far as to say fringe protestant groups are overrepresented for this reason (mormons, jehovah's witnesses, pentecostalists etc..) The one's that are not simply snake oil cultists are still often poor representations of the western practice of their doctrine, usually very liberal in comparison (gaining support by coming off as liberalized or easier to practice in comparison to the ROC). Many are simply political discontents mascarading as faith groups with little or no ties doctrinaly to their western counterparts.
Yet when the government cracks down on con artists Christian groups in the west scream bloody murder with zero clue as to what the situation on the ground is.
That's to say nothing of the 'bibles for Russia' organizations in the west conning unsuspecting folks in the west to donate lots of money when a decent copy of the Bible is available for a few dollars in Russia, and free from numerous Russian groups. (I can assure you that not all of that cash is going to Bibles.)