Forums are a double edged sword, being you can use them for a variety of reasons, though then you have the issues associated with being online too much. When I say too much, if your online from when you wakeup and through till you go to sleep, and only sleep a few hours because you are online until you literally are near falling asleep at the computer, then you have another issue, being an Internet addiction and need to tackle that.
Trauma has a timespan in which you need to heal it... and as I have told people over and over... you really need to jump into it once, go at it with everything you have for a hard 6 - 12 months of your life. Then you get to work slowly on more the exposure aspects to regain your life into society, without having to constantly worry about he past trauma itself. Sure, talking about it is one thing, but talking about it shouldn't then be causing a lot of negative fallout with symptoms for any type of longevity, if at all. Really... once you heal it, you should be able to leave it in the past. If you haven't healed it, then its not going anywhere either... so no amount of ignorance is going to change your current day to day life until you deal with the problems. If there are no problems, then there is no reason to discuss it. But if there are... then it has to be resolved, not just discussed, but resolved.
Some things need time, and no amount of discussion will solve them. Some aspects of PTSD need time.
If you have unplugged from forums and you are still at the same point... then your therapist is an idiot. If you haven't unplugged from forums and the Internet, and actually given yourself a good decent try and getting through problems and reintegrating yourself into life, dealing with aspects yourself... ie. support is great, but you MUST walk the path yourself without all the support at some time to get the benefit.... then if the later, your therapist is absolutely correct.
You must answer the question for yourself...
I will be very blunt about trauma therapy. A good majority who state they do everything they can, that they really push themselves, actually lie about their own effort. I absolutely fooled myself for years... before I really knuckled down and gave it my all, handed my trust over and allowed others to start pointing me in the right directions, then actually doing the work, not just saying I am, or that I was trying, etc. Trying is great, but it doesn't resolve the problem. Doing, redoing, and continually doing until the problem IS resolved... that is giving it 110%. Trying is a nice word in trauma therapy for bludging and giving things a half hearted effort.
The next question for you is... really how do you honestly categorise yourself with your true healing effort at this stage? Have you healed your past trauma? If not, why not? What have you done? What honest effort have you put into exposure therapy? What honest effort have you committed to the emotional aspects of your therapy?
My philosophy has always been that being online longer than you need is destructive to your healing. If you have got everything you can and healed, now need to put all your knowledge into action to finish your healing off, to reinforce to your brain the knowledge and lessons learnt... then yes, online is hindering you.
It doesn't matter how or where you heal... as long as you do it. Its like when people tell me they've been in therapy for 5 years, 10 years, etc... I just laugh. Because it means your absolutely bludging... there is no way any trauma takes that amount of time to heal. Sure... if you go there just to discuss things, not trauma specific... that is different, but anyone who says they have actively been working on their trauma for 5+ years... my response will be the same every time, being: you're kidding yourself that you know what hard work and trauma therapy is, because your bludging and your therapist is an idiot who is taking your money and stringing your along by keeping you ill.