Originally Posted by
carrotjuice
Mobile phone signal jammer used to work like a dream. Until people started doing data calls.
Jamming wifi is no harder a problem than jamming GSM or similar. Hours of fun can be had switching the jammer on and off as the "annoying person" thinks their phone is the problem and gets increasingly irritated with it. Not legal to use in various jurisdictions and of course could interrupt those with a genuine or emergency need - but for occasional quick burst on and off in the appropriate location - I see no harm