It does kill my home WiFi users' ability to connect, I've not tried using it for "fun" at say a Starbucks or other such establishment with "free" WiFi. I'll have to remember to pack it next time I visit a populated area....I've been seeing reports about the Line 6 rendering WiFi useless. As an more mixpersons take up mix via iPad, this is going to be a real problem.
IMO, relying on a wireless connection for mixing is not a good idea at all.