Be extra careful, airports and other large public transportation venues, shopping malls--anything of the likes.

There has been a recent onslaught of 'Free Public WiFi' at public places such as those I listed.  They are either not from the intended source or a source that was authorized by the 'Landlord' or other property controller, and you will be hacked. 

The known mission of the ones already discovered has been 2 things.  One is installing controlling systems within your electronic device for ads and software solicitations, etc., and the other is to learn your personal ID, saved passwords and financial info, etc.

Be extra careful.