I’d do it, for a number of reasons:
|*| I wouldn’t want to risk my work situation. Sure he might just take it on the chin, but why risk finding out? To everybody who draws the conclusion that the boss is a scumbag - maybe so, but the potential scumbag is still his boss.
|*| It gets the kid through a tricky spot. Who hasn’t been in a situation (fair enough likely down to their own bad practise) and wished for a leg-up like this?
|*| You clearly would enjoy it. And get paid at the same time.
I’d add the caveat that it has to be a one-off. If he gets asked for more then you can’t/won’t help. If he gets examined on the subject he’s on his own.
Based on the number of “OMG never!” responses I wonder about the level of truthfullness being shown here. So it’s dishonest, we’re not talking about helping to bury a body here.
tim