IMHO, there is nothing wrong with letting players getting their PCs killed over and over again using bad tactics.
No, there's nothing wrong with that. I'm just tired of doing it that way. It detracts from the fun for me.
Your case is different. The players are on a death carousel, generating and killing PCs over and over again, and not recognizing that the problem may be in PC selection or tactics.
Actually I'm pretty sure they're aware of it. They just don't seem capable of doing anything about it. Also, there hasn't been a death carousel in this campaign so far. But if you were to look at our group's overall history, which spans several D&D 3.5 and 4e campaigns, as well as several Star Wars Saga Edition campaigns, you'd see a recurring issue.
My first D&D 3.5 campaign with the core of this group had few PC deaths at first, but once we got into the
Red Hand of Doom, we had not one but three near-TPKs. The last was the final straw. We abandoned that campaign altogether.
I abandoned my one and only D&D 4e campaign before it went on long enough to result in that sort of ending - but the guy who took it over managed to keep it going for a few more levels before all but one of us got turned to stone by a medusa in the Pyramid of Shadows. We abandoned that campaign too.
Our current 4e campaign is going well so far. I don't think anybody's died yet.
Our first Star Wars campaign didn't go too badly either. Can't remember if we had any character deaths in that one or not. The second one ended in a near-TPK that the GM transformed into a "you're all captured alive" scenario, but we still decided to end it after breaking out of prison.
My own SWSE campaign is also going well. These two PC deaths were the first and they only occurred because both players chose to let their players die.
However, I've just had some good news: the player of the Jedi PC has agreed to keep playing him at least until the end of this module. Hooray!
And I've also found a potential new player who's going to make a party leader/social skills guy, so that problem is solved too.
