I'd be really curious to see if there is any correlation between the amount of bad beat complaints and the long term EV of a player. Just sayin'.
Now you've got me curious about two players at my local cardroom. I was playing in a tournament with them a few weeks back. One of them (who is a total maniac) was complaining about all the 'sick beats' he suffers all the time. This then prompted a 'I run the worst in the whole world' row with another (also LAG) player.
Now I'm pretty sure the latter player is -EV as I've talked to him about bankrolls. He had no idea what I was talking about and then went on to tell me told me how much money he'd lost online. This, combined with the fact that he's not one of the regular live winners, makes me pretty sure he's down overall.
The other guy has had a fair amount of live success, so who knows?
Personally, I only ever tell someone about a hand I've played when I'm trying to learn something about the hand. Whether it's a bad beat or not isn't the point.
If someone else tells me a bad beat story, I'll either politely smile and change the subject or, if I know them, I'll tell them to save their breath. Of course if they're looking to analyse the hand, I'm happy to listen (as long as they're prepared to listen too).