You'd have to be insane...
...to use an open access point.
By using one you're giving the owner of the WAP free view of all your network traffic: including unencrypted passwords you might use to log in to your banking etc web sites.
Second the operator of the WAP can re-direct you to any sites he wants, even ones that appear to be what you wanted but aren't.
And you're not safe if you use a paid for WAP either: you've might just have given your payment details to a crook.