I couldn't agree any more. It boggles my mind how people see the need to bring their car to a professional for engine work or a brake job, but will not bring their vehicle to a professional to service their 12v system when a misstep in either can be VERY unsafe. I have no problem charging double (and sometimes more) to repair your mistakes. Just because you or your friend hacked a radio into a 94 Civic or you're a mechanic/electrician/MIT professor (my personal favorite

) doesn't make you qualified to install anything related to car electronics.
Oh and BTW, after the MIT professor left insisting he could install his radio in his 97 Cavalier(

) I happily charged him to install it 6 hours later after he couldn't figure out how to take his dash apart.