Assalamu alaykum wa rahmatullah
Been away from TTI for a few days and this conversation is still going
Here's how I'm going to put it insha'allah and hopefully it will be acceptable.
We do not mind whatever people want to put under their titles, that's no problem if you want to put brother/sister. Some people with ambigious titles might feel a stronger need to do this, than others.
However, I do not think it is needed that we place it on each and every post. Foremostly I do not see it as a neccessity, that we must know who it is, as perhaps our method of addressing then may alter in a manner which may not be correct. Though to not give leeway to that suggestion, more importantly would be the fact that MrMuslim posted, that then cross gender PMs occur more often with offers of marriage etc. When a person sees a post they like many times they go off and PM them seeing it's the opposite gender asking for their hand and giving a long bio detail. Sound crazy?
It's not. After having to deal with some of them and send countless warnings it does happen! And it's not something that we can just stop PMs from boys to girls as it is needed sometimes via getting information, sending to Moderators etc.
However, what I most dont get is what the big deal of being called a brother or a sister if you are not is? I mean does it make you confused in any way? (I hope not! lol) In that case, just forgive and forget. Or if you dont want to, just correct it in the forum, I mean seriously, it's not as if it's a matter of severe importance. Truthfully if someone wants to check, just pop over to the User Profile and look at it. And the reason it's prohibited for new members is because they are the ones (not all) most prone to sending these proposals as their purpose is not to come to TTI for the original reason intended.
Basically, my view is that I dont think we need it on each post, but user titles are personal preference.
wasalam