Apparently a few consignors are having problems getting paid. The owner has a serious illness and I am sure no one there has set out deliberately to swindle anyone.
Talk about underselling the severity of the issue... How are you possibly "sure that no one there has set out deliberately to swindle anyone"? I suppose that one could hope this is the case, but how are you in a position know other than by projecting personal optimism? This company had a track record of slow payment to consignors long before the current health issues surfaced. Talk to dealers; Regency did NOT have a sterling reputation.
Furthermore, this goes beyond merely "having problems getting paid". The business is bankrupt and in receivership. Formal communications have been made to certain consignors if not stating outright, at least implying heavily that they will not be receiving payment for their property that Regency sold and collected money for.
If it walks like a charlatan...
ANyway, getting back to the OP's point. Yes, there have been stories like this throughout philatelic history... Greg Manning, the Apfelbaum expulsions, Davitt Felder, etc.
The movers and shakers at the highest levels of philately do certainly appear to close ranks quickly though; a philatelic "blue wall" so to speak.