No, L-shape loft beds aren’t dangerous as long as they’re used correctly and for the right age.
In fact, we don’t recommend getting kids younger than six to sleep in a loft bed as they could fall or injure themselves.
For older kids, just be sure to choose an L-shape loft bed that meets relevant safety standards: for example, with slats that are less than 3 inches apart, guardrails that are around 4 inches higher than the mattress, a 12-inch gap for access, and steps between 1.2 and 8 inches apart.