@ZoranPetrov, I get the frustration at players who make “stupid” raises each hand. However, the best protection is to figure out an appropriate strategy to exploit that. If they’re going all-in preflop every hand with 50BB, wait until you have a hand at the top of your range, call them, and double up. No need to get snippy at them, just collect their chips. Alternatively, play mixed-limit games, which only allow pot-limit bets preflop, with no limits on later streets.
Keep in mind that raising a moderate amount preflop when you want to stay in a hand is a standard play. You don’t want to play small, multi-way pots. One good reason for that was recently explored on this thread. It’s good to raise it up preflop and knock out weak players and the blinds, or pick up value from those weak hands by getting them to overcommit their equity. Of course, raise size is important - you don’t want to bomb it with massive open sizes where you’ll only get called by better hands. Target a raise size where you’ll get only one, maybe two callers in a 6- or 9-handed game, and adjust open range accordingly, playing fewer hands with a larger raise size.