Most of them only have their blog name tagged but I still think having an all-inclusive tag would be more efficient than blocking every new ask whoever blog that appears. If one already exists (ask?) and just isn’t used, oh well I can get over it, no biggie. (I guess I can add it to every such post I see if that’s the deal.)
I used to add “tumblr” along with too, but since others don’t and the tag is used for generic tumblr stuff too, I usually don’t anymore these days.
“ask tumblr” tag: Huh. Never even noticed this one. It was started a year ago and it is tagged to 2000 images. “ask” is 2 years old and tagged to 5000 images. I vote ve alias/merge this into “ask”.