Info: I have a high tolerance for PDA in a variety of formats, from RL all the way to text.
Info: There's such a thing as too much of a good thing, however.
Info: There's the phenomenon where a couple tunes out everybody else and just gets all shnooky-wookums wuvvy-dovey with each other, and damn whoever is made uncomfy or bored by the process. When Deep Space Nine was being broadcast, we used to call that the Delta Quadrant Phenomenon.
Info: It's perfectly acceptable, when a couple is in the Delta Quadrant, to pretty much ignore them for your own sanity. In a text format, this can be accomplished by the actual ignore function.
Info: If they don't want to be ignored, maybe the couple ought to privatize their public displays, whether by getting a room or trading IM addresses, depending on context.