EVERY action you do attacking or defensive has holes, leaves you open somewhere, nature of the beast
VT has had the saying "when your greedy with punches mind your empty space" for quite some time with regard to chain punching.
As long as your aware of the possibilities and have the skills to use techs to deal with the downside of actions your fine.
So for Bong-
If someone is good enough to turn your elbow when you apply a bong you should at least have two options for getting out with good enough reactions.. Dan Sau is the basic responce taught to me , there are many more for Bong and every other action of VT IMO.
Hell No. especially when it comes to Pie or Karp JarnDo you agree with the principle, "拳不露肘(Quan Bu Lu Zhou) - never expose your elbow to your opponent"?
First one would have to identify the problems with it which varies from person to person.. But the general rules you apply to punches is a good start.How would you make your Bong-Sau safer to apply if you have to use it?
Dont leave it out
Dont over extend etc etc