I agree with alot of what has been said, I only read the first page. Reading all the pages isn't really needed. The deffinition from m-w.com is this:
role-play
Main Entry: role–play
Pronunciation: \ˈrōl-ˌplā, -ˈplā\
Function: verb
Date: 1949
transitive verb
1 : to act out the role of
2 : to represent in action <students were asked to role–play the thoughts and feelings of each character — R. G. Lambert>
intransitive verb
: to play a role
:with that being shown and everyone knows the deffinition of role-play I have to say that for about 5-6 months I believe it was I had a friend that I met when they were on a female character then when they told me that they were a male in rl it really didn't affect our friendship at all. When you put yourself in an rp your merely playing a role. Is it not in our past where women were not allowed to play roles in plays and the like and women roles were played by...here's the shocker prepare to gasp...men?
Insulting, as more then likely they saw it, a sim that someone calls "home" can be a big hit to them if they look at it like "They just insulted the sim I live on that equals them insulting me!". Which in most cases is far from the truth...but then where would the fun be without ego ^_~.
Onto the rl relationship through sl, I myself met my girlfriend through sl. I believe if you have no intentions of furthering the relationship it should be known from the begining that you do not wish to have anything in rl.
As a wrap up:
You want to rp a female when your a male or male when your a female then more power to you! Just remember to rp to your fullest. If people can't accept that you enjoy the challange of the rp, weither it may be cross gender cross species or anything of the like then that is their issue and you should just forget about them and their like to expand their knowledge of things.
Make things known at the start of any type of relationship what exactly you are looking for that way you wont get hit with a "OMG! WHY DIDN"T YOU TELL ME YOU WEREN'T (insert sex here)!?!?"
But hey what do I know I haven't been able to be in gor let alone sl for a few months ^_~

"The one who overcomes egotism rids themselves of the most stubborn obstacle that blocks the way to all true greatness and all true happiness."