Submitted by ConnieKai t3_11buerq in LifeProTips
It communicates that they are sharing their conversation with the rest of the world and disturbing others around them. Obviously, this should be reserved for the people who do this in a crowded space, like on a plane or bus.
the_original_Retro t1_j9zwqeg wrote
LPT: If you want to get punched or slapped, do that.
Betting OP never actually did this themselves, they're just advising other people to do a /r/shittylifeprotips entry.
LPT: If you want a lower probability of getting punched or slapped, ask "Pardon me, would you mind taking that off of speakerphone?", or just walk away to a different place if that's possible.