What would you rather have if the worst happens and you lose your job? A little money in the bank, or a nice TV to watch American Idol?
If the economy tanks, he loses his job, and he's out on the street, the $1200 he would have saved by listening to you would have lasted him a month if that. It's not like all of these things are going to happen and the television is going to be the single reason he's in trouble.
Breathe easy. If you want the television, go for it.
There's nothing wrong with the all the advice- it's all very sound, but seriously, if buying a TV is what sends you into financial misery, you weren't in good standing to begin with.
Nothing wrong with buying things on credit if you can stop with the television. Just don't run up a bunch of debt by not being careful.