At CA casinos, i commonly see
ploppies do these type of doubles, especially asians.
many are true gamblers and very superstitous.
if you make the play, you may also be suspect of knowing the hole card.
i personally know all of the indices and make all of the plays and never got heat (max bet 2 x 200). i personally have had the opportunity to split 10 about seven times and double soft 21 once which also fall in the idiot category
people have all sorts of crazy reasons for doing things and if you can make them believe that then you can get away with it. i have never had the opportunity to double 5 vs 4,5,6 but i would do it and i doubt it will get me heat.
," but it made me very uncomfortable... " and that definitely won't help.
but like they said. if you play shoes you could go a lifetime without seeing the play so it ain't that important.
one thing fo sure, if i get the play and above RA index i don't see why i wouldn't make the play. how you act and what you do before, during and after the play makes a huge difference.