Well... one "logical" way to tell if your high beams are on is if it brightens up the whole god damn road from the ground to the top of a skyscraper that should give you a hint yet these people think it's normal everything in front of them should be lit up.
Dyson vacuums are very badly designed. First of all, the power switch on ours is on the right of the unit when it's stood upright, so if you want to switch it off whilst vacuuming and you're right handed, you have to either reach under your other arm with your left hand or let go of the vacuum to use your right hand to press the button.
Then there's the handle bit that disconnects to let you get into smaller areas, but because it's normally a handle the end has a little lid that only folds back far enough to expose half of the hose, which affects suction dramatically!
Then there's the attachments which are designed to click back into the top of the unit when not in use, but often end up splitting in half due to an indented ring in the neck of each one (for no apparent reason). Once they're split they won't go back into the holders! ARGH!
Not to mention that the hose on ours has split from regular use.
EDIT: Whilst I'm here, I remembered some more!
Mikomi Headseat - I only use this as headphones. They have a volume control unit thing between the headphones themselves and the laptop, so I can control the volume when I'm away from my computer. But on this unit is a bright blue LED that flashes all the time the headphones are plugged in. It does nothing, it just flashes when they're plugged in. That's it. If you don't cover it up with something it sits there flashing at you distracting your view!
Vauxhall Astra Mk3
My car is more annoying though, especially when I was trying to remove my stereo. For some reason the guys at Vauxhall decided to secure the head unit cage with a split clip that had to be gripped by pliers and squeezed before you could remove the cage. However, it was at the very back of the cage, inside the dashboard. This wouldn't have been a problem if it was facing sideways as I could get the pliers in but the bits that needed squeezing faced vertically! WHY?! In the end I removed it by smashing it to pieces with a small pair of pliers.
Then there's the airbox which is secured by clips that are easy enough to remove but when you try to replace them they either fall into the engine bay or won't click back into a secure position. The interior light controls are on my side near the wheel so passengers can't turn it on themselves which is annoying in the winter when they need to use it. Oh, and the car seems to store heat like nothing else on Earth. You can be parked in a fridge and when you get into my car it will be like an oven inside! It doesn't even have a black interior.