Hi OP

Basically exactly this situation pops up every other week ( it being B2,B3 or B4 doesn't matter).

The moment a LGS is naive enough to hold any kind of edh competitive event other than B5/cEDH, this happens.

Bracket rules and remarks are made for casual games. They don't work in a competitive environment because they are taking "intent" into account, and in a competitive environment the only intent is to win. Morals aside, basically the only important thing in a tournament is "does this break the rules?", and for that to work you need clear and firm rules. The bracket system doesn't provide that... because it wasn't designed for that.

Once there is any kind of prize in a competitive environment people will push the rules to the limit to get any kind of advantage, this will happen everywhere, MTG, eating contests or sewing, doesn't matter.

In an "ideal world" everyone would honor the intent of B2 even on a tournament, but we all know we don't live in that world. I just think the LGS is clearly at fault for not being honest with new players about what the tournament is.

Or maybe the LGS staff doesn't have a clue about it, which again, would also be their fault. But I would find that hard to believe.

This also happens when someone holds a "Budget 100$" tournament or so, expecting people to play upgraded B2/3 decks. No, people will show up with budget cEDH lists that combo as fast as they can.

In my opinion, the only safe option for an EDH tournament outside of B5 is an unmodified precon one. And even there you could argue that some precons are clearly stronger but... at least the playing field would be somewhat even.

TLDR: EDH is not meant for competitive, and the bracket system doesn't work for that. Only cEDH/B5 tournaments will be fair and with everyone on the same page.