I know everyone is an expert in here and has multiple exchanges of their own and are happy to state how THEY or Cryptopia SHOULD have done things but thats not the case.
Some of use here are business owners or have been involved in the management of a business and we know very well how customer relations should be handled. What Cryptopia is doing - keeping silent - is at least suspicious and very worrying from a customer relations perspective. Effectively severing relations with your customers and perhaps sending some anonymous persons to annoy the user base shows that you don't want customers any more.
Also Cryptopia doesnt "instantly" delist coins, their knowledge base site specifically states when a coin was announced to be delisted and when it will be delisted (usually a month later).
Actually they did just that - they suspended trading at the moment of the announcement, that's an effective delisting.
One could even think you are an agent provocateur from another exchange as you make Cryptopia look even worse than it already does after 40days of complete silence.
Nothing prevents them from setting the record straight, to announce the facts and any future plans, to put their customers' minds at ease. But they don't do it. I only know of one such instance when you keep silent despite making things worse by doing so: when the lawyers tell you to say nothing further in order not to draw any (more) personal liability.