justsomeantifas:

There is a reason why black bloc wears all black. There is a reason why everyone one of them cover themselves in the same color, all dressed very similarly, too similarly to tell one from another: it is the point. That is the tactic. The tactic is to keep each other as anonymous as possible, so you can engage in direct action against our corrupt government.

This is why pastel bloc is not a very great way to engage in direct action, it would be one thing if all of you dressed in one color, be it pink, or yellow, or whatever else, but all dressing in pastels that differentiate you all from one another defeats the purpose of what black bloc was trying to accomplish.

TL;DR pastel bloc compromises anonymity which is important when engaging in direct action.