But you can. Everyone carries a mobile these days, so just get some cards printed up saying "please ignore our little talk, I may have been talking through my fundermentel orifice. I`lll ring you back in half an hour".
Hand them the card, smile, and make your getaway.
{what you do half an hour later is up to you}
If it only were that easy, if i could delete some of the things i texted to my ex/said to my ex, Id be a fricken angel..... but i cant, So im no angel lol. Like everyone else, live with the consequences of what you have typed or said, and move on.
For that reason i make sure i dont "log in" when im drunk, i just read lol.