well, a lot of people use them for pvp (including myself) and this opens up the opportunity of getting kicked for “potentially glitching” while tagged and losing your inventory.

also, i use fast event weapons for faster ground travel, and i did this yesterday and i got lagged back every ten seconds. i was even kicked underwater for “not taking knockback”.

edit: also, callie did a major sale of a ton of event weapons, meaning that they are in the hands of a lot more people then they were before. also, people have died and lost them to others as well.