Just because you can, that doesn't mean you should. 

However, there is always an exception to the rule and these DIY engineers are the exception. If anything we need more blue-collar engineers, not less. While it's easy to roll your eyes at someone with a stoplight for a mailbox or people using water bottles as a shower head. 

So we tip our caps to these DIY inventors, the redneck engineers, and all those who can turn lemons into dynamite.