There is a new type of malware and account stealing for MEW. Its called MEWkit. It steals money from the victims wallet through a front-end program that mimics the MyEtherWallet.
Another one targets airdrops. They basically ask you to fill out a form with all you info and address and then redirect you to another site that is a clone of MEW. You will be requested to sign a message that will in turn steal your keys. This was informed by the official MEW account on twitter.
yes it is very dangerous, we must be very careful
I am used to bookmarking important sites to avoid being directed to such things
I also usually check the site twice before filling in important data