There is no attempt at market abuse here, unless of course you see it as an attempt by the company to mislead the markets as to the true impact of the disaster - is that what you mean?
Just because someone asks questions that are contrary to the companies 'official' statements is just and proper - I would love to see the company attempt to take action against any individual here based on what is being said.
Any poster is just as free to post that these questions are totally without foundation and that everything has and is working perfectly.
For investors to make a balanced judgement is exactly what these BB's are for; if the company wants to dispute anything that has been posted here, then they are free to do so, what's the betting that they don't?