Two incidents relayed to me by friends would indicate that Curtis Strange (no surprise) and Lee Trevino (surprise) are indeed major jerks. I can't remember for sure the particular tournaments my golfing buddies were at to witness these things first hand, but I think it was Trevino at the BC Open back in the 70s and the Strange one at a US Open somewhere here in New York, possibly Rochester. I know these guys very well and they don't just make stuff up. The Trevino incident was witnessed by two of them attending a tournament together, so it's "corroborated".
Trevino was enraged by a 14 or 15 year old girl handling the scoreboard, who had put the wrong score up for him. He walked up to the scoreboard and started yelling at her to change it and she dropped the number card, delaying the action. He got more furious (like it really mattered, ya know?) and started screaming at everybody on the scoreboard, telling them to "Get her out of there!" The girl started crying and climbed down, heading for the clubhouse. Trevino stalked after her, screaming obscenities and, to put the icing on the cake, finally yelling, "You dumb little c**t!" She left the area in tears while Trevino continued on to the next tee. Despicable.
Strange, having just had a bad hole was walking along the ropes to the next tee. A kid had a US Open hat he wanted autographed and was holding it through the ropes. As he walked by, Curtis grabbed the hat and THREW IT INTO A MUD PUDDLE ON PURPOSE! Major Ahole.
I saw Chi Chi in action at a Senior event in Syracuse about 20 or so years ago. He was going into peroxisomes about an official's golf cart that was bothering him. Maniacal, doing everything but hitting the official with his driver, screaming at the top of his lungs. Jim Ferree was just shaking his head and laughing about it with the gallery? "Whatcha gonna do? He gets like that." Total insanity, profanity flying everywhere. I felt like I was watching baseball or something, with the manager screaming at the ump after a disputed call at first base right before being ejected from the game. Don't often see THAT sort of action from a pro, let me tell you! Never viewed Chi Chi the same again after that. I mean -- there was NOTHING TO IT! He had to wait maybe 15 seconds while the official trundled up the side of the fairway in a cart, delaying Chi Chi's tee shot. Really earthshattering. sheesh. Maybe he forgot his meds that day, but I'm not cutting him ANY slack after what I saw.