I have been using myetherwallet for quite some time now and have used it yesterday for selling some coin that is getting dumped rapidly. Judging by how I haven't encountered any problems yet in using myetherwallet, I do not see any reason as to why I need to worry about it being unsafe to use. What's happening is not something that is very alarming, it is nothing but a healthy competition about who will be the best online ethereum wallet. So unless you are careless with your private keys and other security measures, you really have nothing to worry about and can sleep soundly tonight.