I was going to post this as an additional reply to this thread but I decided to just make a new thread, because that thread is **** cluttered already and I wanted this answer to be easy to find rather than buried on the 3rd page somewhere.
Assuming DfoTY preempts an effect from activating by blanking its text box (the current ruling at the moment), it follows that if both players create "if this attack deals damage" effects, then if one of mine is Ka Technique then I will be able to prevent my opponent's from going off. Lemme make an example, because that's not really clear....
I play Flooded-Nile Throw. My enhance first, I'll use Saikyo ryu.
My opponent enhances with Shooting Capoera.
I enhance with Ka Technique.
My opponent passes enhances. I pass. The enhance step ends. The block step comes and goes.
The throw deals damage. I'm the active player, so Ka Technique resolves. I choose Shooting Capoera as the target.
My floating abilities are done. My opponent's start; Shooting Capoera goes off and does nothing, because it has a blank text box. Justice is served?
Additionally, can blanking the text box interrupt abilities that have already begun to resolve? The first one to cross my mind is Sophitia** -- if she uses her enhance to make me discard X, and I use Rashotep**'s Enhance to blank her text box, will the other half of her ability ("if this attack deals damage, draw X cards") ever possibly go off properly and allow me to draw cards, or will it suffer from textless syndrome and basically fizzle?