I understand what you and the OP are saying, as do most people here. What you fellas seem to not understand is that MOST people DIDNT grow up with the same 'old school gamblers' as YOU personally did, therefore not everybody is playing by what you guys perceive to be a given (your assumptions as to what the unwritten rules of gambling are). Maybe the guys you were playing did also, and should know the same unwritten rules you obide by, but we have no way of knowing that. And if they DIDNT, then THEY have no way of knowing what YOUR personal rules to gambling are...
If your competitors DID know the (your) rules, then I agree with you, they pulled up limp on you and you have a right to be mad... But from the OP's original post, it seems at least one of the other guys wasn't a 'regular', and therefore I wouldn't expect him to know the rules you guys play by. If he didn't know, and it wasn't stated beforehand, then he isn't wrong. You are for getting mad about it, when all you had to do is take a freaking minute to state the rules of the gamble..
All most people here are disagreeing with you about, is that if the (your) rules were not stated beforehand, then there ARE NO RULES... If someone comes into my place that I've never seen before and wants to play me, even for no money, I always make sure we're playing by the same set of rules..
Saturday night a guy came in who I've never seen before. Came right over and asked my buddy who would play for $100 a game, he pointed to me. I had just started playing $20 a game, and was only ahead 3-0. The guy I was playing said 'I'm cool, go ahead', so I told him I'd give em' action, and said $100 a game, minimum 3 ahead, post up. He looked at me like I just spoke Greek to him! Everyone around me knew exactly what I meant, but i had to explain it to this guy. He said he never heard of anything like that, and he'd play $100 a game, that's it... We've all been there before and know it's either beat this guy in probably the only game he was gonna play and take the $100, or argue about it and not make anything when he walks away. I made the $100 and went back to my other guy. Point is, If I didn't stipulate the gamble beforehand I wouldn't have know what he was willing to do. I could have slow rolled him the first few games (I wouldn't have), trying juice it large down the line only to have him get up a game and walk. I would have been just as mad as the OP was/is, BUT at MYSELF, not him, for not laying out the gamble and getting it posted...
By the way, I grew up with the same type of old school gamblers you did. I would NEVER brag about being just like them, like they were something to emulate and look up to. Those guys, and their the same guys no matter where your from, we're the biggest losers I've ever saw! All they did was take money from one another and pass it back to each other with every gamble they did. Never got ahead for long enough to do anything with it except pay the the juice from last week's big loss (be it pool, football, boxing, basketball, machines, whatever..) that they had to borrow. The shy's made actual money from these crumb bum bottom feeders, and cleaned it the right way. Years later the 'old school gamblers' were still doing the same broke down routine, just paying a new set of shy's, while the old Shy's were able to get out and live comfortably, and not worry about where their next meal was coming from.... A shy took me aside one day when I was real young, and told me to look at that guy (Northside Bob, the best player around my area back then). I said ya, he's the best. He said he's a bum. He can beat anybody in this place with one arm, but look at his clothes, where's his car, look at where he lives (rent by the week, one room place), and ask yourself why is that? Then he said look at me, my clothes (always 3-piece suits), my car (caddie of course), and my house (real nice for the area back then)... Point was made.. Nuff said.