From what I have seen, Monarch Arline is saying they are financially strong. What they have not said is whether Moarch Holdings and/or Monarch holidays are also.
Time will tell, but what I suspect we are seeing is a possible shutdown of the Holidays operation and a need to repatriate rapidly due to suppliers such as hôtels not being paid (possibly with outstanding debts), and the airline being unable to provide the adequate additional capacity to cover all routes.
If this is the case then it leads to an interesting question of the responsibilities when the Holiday part of a holding folds (or is folded) yet the airline part continues to operate. Indeed, it would be interesting to know at what price the Holiday arm is billed for the airline flights, and when i.e. have they already been paid for the return seats?
As to the role of internet and in particular blogs, yes it accélérâtes communication, but it is not like the planes flown in are done so by stealth and it is difficult to hide a 747 on an airport from anyone who is half-trying to be observant. The risk is that posters do not make it clear as to what is fact and what is supposition or even totally unfounded. Wikipédia requires cross-references to establish where the information was sourced.