I've been noticing that a lot of people use the reasoning, "I raise because I want to pick up the dead money." A lot of the time I see these hands with that reasoning it's just a major .

The money is not dead if the villain is rarely or never folding

say you hold on a board. Villain is a fishy reg who rarely folds over pairs postflop and you are pretty sure his range is exclusively OP.

Villain pots the flop and you jam using the "pick up the dead money" reasoning (obv + the SF equity). You just made a mistake. You know the villain is NEVER folding an OP therefore his bet cannot be considered dead money.

Granted the above hand may not be the best example but the point is, you have to actually consider your opponent's range and tenancies and not just fall back on HURRR DERRR MANIES IN THE PAWTS! GOTTA PICK UP DAT DEAD MANIES!