Just because it never happened to you doesn't mean it doesn't happen. Indeed several people here have reported it. The Wichard is nice. But is also has a mouse hole on the pin. Wonder what that's for? Maybe sizing wire? Hmmm.Yea, I'm going to go right out and get me some $500 snap shackles for my halyards (T-series are the trigger-release snap shackles).. BTW, Tylaska makes a thing they call a halyard shackle that's only $100.
I used Ronstan halyard shackles on my C36. Never taped them, never an inadvertent opening. $20.
New boat has Wichard screw-pin halyard shackles. $60. How do these open inadvertently?
The Tylaska shackles simply don't open by themselves. And they can be opened under huge loads. If that's important to you buy them. If its not, don't. $500???? In reality they are about twice the price of regular shackles. Not bad for the extra security.