Better blocks arrive on the correct layer (e.g., S-SCAFF or A-SCAF ). The lines should be colored by lineweight (e.g., Grey 9 for structure, Red for safety rails). If a free block inserts on Layer "0" with random colors, it is low quality.
Better scaffolding blocks typically provide multiple perspectives to ensure your plans are accurate: CAD/BIM Library of free blocks - "Scaffold Caster" scaffolding autocad block free download better
"Free DWG" sites that look like they were built in 1998. They often contain exploded blocks with 10,000 individual lines that will freeze your computer. Better blocks arrive on the correct layer (e