Let's say you're part of a 'non-geographically based band of brothers'. You've had a lot of fun and made some friends here and there. Let's further assume you have gone and trusted one of them so far as to purchase some some wine at a dinner the previous evening as there was a promise that everything will be settled in the morning. Let's say that even the following morning, said person reminds me about said purchase of wine and asks for the cost. Finally, when said person forgets to pay me and I remind him gently outside by the bikes, that he doesn't get the hint and fucks off to Blighty. Would you grass him up?