A friend tells me he will go all in for $10 preflop, when there's $.30 in the pot, 3 other players at the table, $.10BB, if he has pocket fours every now and then, and buy the pot. He only likes to do this if he thinks the other players are pretty risk averse, and can be scared off easily, and likes to do this more if a couple players can only take you in for $5.00. My friend otherwise plays in a way that is fairly cautious, so he says this has some added psychological benefit?

We are having some dispute about whether this is a good strategy or not.

So would you do this? Is this a good play or is it too aggressive?