The few users who feel their topic will be spammed or they may be harassed can make use of the "report to moderator" function. The rest of the threads will be open to have reasonable questions asked and discussion to take place on this forum, considering this is where the Ads are placed. It will still depend on members to ask the right questions but I think there are plenty out there that patrol and will do just that.
Whilst they can be abused they're also great for keeping trolls and spammers out of your own thread. If people don't like the moderation here (or lack thereof then they can moderate their own threads how they see fit). Mods rarely get involved with trolling or users just being annoying (and that is obviously completely subjective) so users should moderate their own threads and make up their own rules if they want. It others don't like it then they can either not post in those threads or create their own for censor free discussion. You can even self-moderate that one if you want and mod it how you like. Sure, there are lots of scammers taking advantage of it also but to me a self-modded and locked thread is a huge alarm bell and now we even have warnings for outside users if they're marked so I think people should just use their own initiative and protect themselves rather than relying on the forum to protect against scammers.
There have in the past been concerns as well around these features empowering and protecting the potential scams themselves. They can spread false information about escrows gear and anything they really want with little recourse available.
Staff don't moderate scams so that's what the feedback system is for.