In theory, instant LANs are less secure than wired LANs. This is because wireless communication signals travel throughout the air and might easily be intercepted. To prove their point, some engineers have promoted the practice of wardriving. Wardriving involves touring through a residential area with Wi Fi accessories and scanning the airwaves for WLANs that are not correctly included.
On stability, though, the weaknesses of instant protection are more theoretical than useful. WLANs protect data through encryption standards that make wireless communications as safe as wired ones in homes.