Well, this is a very stupid question, but… anyway, How many times do you have to blow a reed from the cane side (in the chanter or not) to ruin it? I know it´s forbbiden but Who didn´t do it at least once?
My reeds resist just one blow. 
I can’t say. I have only inhaled.
if your tongue touches it…that oughta do it in!
beginning reedmakers if your reading this …DON’T DO IT!
Blowing a reed by mouth is STRICTLY FORBIDDEN for uilleann pipers who can´t make reeds.
I don’t believe there’s a set number of times but it is certainly not encouraged. When you blow with your mouth, the humidity in your breadth gets into the cane, which swells slightly. When it dries, sometimes it’ll dry fine but sometimes it will be warped. To see what this effect is like, take a sheet of paper, wet the edge and then let it dry. It will be all out of shape. Now imagine that it is the lips of your reed.
Unless you can make your own reeds, it’s best not to tempt fate.
I would never expected so many answers, I played my chanter like an oboe too a couple of times but after each time I had to make another reed.
Go on guys..
Uilleann Pipers never play the chanter like an oboe.Ghb/Uilleann pipers on the other hand,frequently stick the chanter in their mouths and blow it.They just cant resist it.It probably stems from being breast-fed when they were young. 
Yeah bro, you´re right, but… hey what kinda traumatic thing happened to us to explain the UP obsession, even more “reedmaking”
once, in a reedmaking workshop Alain Froment played the chanter like an oboe to check the reed tuning with an electronic tuner.
Of course that was perfectly in tune…
bit of a tangent, but bronze reg reeds can be mouthblown with no damage. very convienent indeed.
Hmmm … not very comfortable, though, fitting three regs in my mouth and trying to tap the keys while playing the chanter with my hands. I think I’ll just stick to the old fashion method …
Possibly, but wouldn’t they be sucking… er… instead of blowing that is?