Nothing wrong with drawing lines if they're support or resistance or showing market structure like triangles, penants etc, especially if you have some kind of confluence system that relies on them. That's just normal business for most of us.
It's more the people that have to draw 10 moving averages, 3 fibonaccis, an elliot wave and an ichimoku cloud on each chart (just to try and impress the scrubs with their complicated looking charts)