I've experienced Controllers routinely vector IFR traffic above or around Special Use Airspace designated (T) for "Training", even when no radar observed traffic is in the (T) airspace, including periods when area weather conditions would preclude the operation of any VFR traffic in the training area, presumably because Controllers don't know the weather in the (T) airspace. Of course (T) areas are neither restricted nor prohibited. Training Areas are classified as "Alert" areas. BSTS (Better Safe Than Sorry).