Your reasoning of "readers don't use it" is not true. That's why in all cases it gets more hits by orders of magnitude more. It's really necessary to distinguish between the ayin and the hamza, and if you want to use the apostrophe for both then it's not correct. It's either ayin=‘ hamza=’ or ayin=` hamza=', anything else is sloppy. 

Without the "H" the ta' marbuta is ignored, and it's another example of sloppy writing. We already had this argument on Fatima Zahra and you won based on google hits. I'm really not sure why you oppose using the "H". Should we RFC this?  20px - Talk