I think this actually might be helpfull because, new people don't know about signed messages until its too late and they got their accounts stolne,
This is why I think user education is important. For a forum dealing with what is now colloquially called crypto, only an astonishly small proportion of users are crypto-savvy.
One of my first thoughts on seeing anything Bitcoin-related is, Why isnt public-key crypto used for all authentication? Of all places, the Bitcoin Forum should lead with that! If you use Bitcoin, you should also use PGP, at the bare minimum; and the attention brought by Bitcoin makes for an opportunity to introduce more people to what old cypherpunks call crypto, resulting in more security all-around.
having a good or a bad password is not the issue,
Password crackers would beg to differ. Most passwords are laughably weak. The way you said that, I am guessing that that includes your password, too.
anyone is vulnerable to get hacked,
In this context, thats the wrong attitude; it encourages people to give up and keep their security weak. Yes, everything out there is broken. The state of the industry is horrific. Most people have bad security because they dont care about security, dont put any effort into itand wont pay for it, which is why the state of the industry is horrific.
I think the NSA could probably hack me. Im sure that forum account thieves cant. So much for anyone is vulnerable.