kek, dont' listen to twitter.
It's problematic when Trans Women (with penis and without hormone replacement) want to be called Lesbians and be apart of cis lesbian spaces and when Cis Lesbians get mad at them, Trans women can call them terfs.
Bi-sexuality is constantly being shunned against because of the hard core trans groups that want to date Het people and are surprised when het people don't find their trans bodies attractive.
Bisexuals are also shunned when you're seen dating the opposite gender. Bisexual is for that threesome you're gonna want to have with your partner one day. >it's only fair that your partner sleep with the opposite sex too every now and then