[mschuster91]

Just for teh lulz, you could do ARP-spoofing on public wifi's too, and achieve the same effect wthout having the trouble of setting up a hotspot.

I admit of having spoofed a Burger King public WiFi and replacing all img-tag sources with Goatse. Priceless reactions everywhere ;)

[lotsofcows]

I like BT OpenZone in the UK. It seems everyone has connected to one of these at some point so you just create an ad hoc wireless connection with the same SSID and most modern smartphones automatically connect and start trying to download mail and facebook updates.

[TheJH_]

True, and that might also give you access to more traffic than just a random open wifi because people expect a wifi there and look for it.