Unfortunately, too many people, especially those on the internet including so-called kosher sites like yw, have no sensitivity for tznius. Therefore the above comments whitewashing the lack of tznius is sadly unsurprising.
Of course hand-holding is prohibited in public. Of course touching is prohibited in public. The fact that it is so difficukt to penetrate the thick skulls above who do not wish any infringement on their hfkkeirus, shows the difference between most people who do use the internet vs . most people who do not use the internet.