I try to do arp-poisoning on my wireless network using ethercap (same method as using on wired). It make the victim network unusable rather than forward packet to attacker computer. Why ?
The ARP protocol uses brodcasts. WLAN will transfer these at it lowest speed - so that all stations can receive them - usually at 1 MBps. As a result the channel will simply be jammed with a relatively low amount of packets send per second. But ettercap need to send a reletively high amount of packets to do its work.
In conclusion, it may simply jam the channel.