The ones just clearly yanking chains to see how many internet moms they can get in a tizzy? No, not really. I'm guessing there are numerous internet sites that I have no clue about where lonely teens could be getting more attention, so I guess I'm not reading those as a "cry for help."
However, I do feel badly for the posters who come here with genuine questions, but because of poor written communication skills or a high level of distress and distraction while composing their posts, they get written off as trolls. I'll admit, if the post is one long, rambling paragraph with 50 lines and no punctionation, it's tough to get through. Because of the confusion in these posts, some responders get caught up in finding contradictory information, and then the responses go off on some other trajectory----usually "calling troll" and such.
I also feel badly for those who have a lot of crazy going on in their lives and limited real-life resources (i.e., no genuine, stable friends and family, financial problems that limit options, etc.). These are the ones that read like a Jerry Springer script. Sadly, some of these are real, and when these posters get dismissed as trolls, it's sad. We M. be the one source of sanity and reason to help them access resources or make a plan to get out of horrible life situations. Having worked in mental health for more than two decades, I can assure you that this level of dysfunction does exist. It might seem so removed to many of us who have so much---stable, sane and mature friends and families on whom we can rely, good educations and careers, financial security and resources, safe and secure homes and neighborhoods--- but to those who don't have these resources, their world looks very different to them than ours does to us.
I always think a more reasoned, helpful response has a better chance of getting through to those people than immediately dismissing them as trolls.
I get pointing out an obvious troll (e.g. ketchup kid), so that other posters don't waste a bunch of time, but too often, I think some genuinely hurting people get dismissed and disregarded when they come looking for information, guidance, and direction.
Just my view from where I am in the world.
J. F.