Although I have known I fancied women for a lot of years it's only this week that I have started exploring it more. From what I've read so far, am I going to get a lot of stick in LGBT circles if I tell people I am bisexual? It's taken me a long time to even want to reach out and let anyone know I am not a straight girl and now I'm worried I will be shot down by the very people I am seeking support from.
Best thing to keep in mind is that anyone can get hate in the LGBT community. There are definitely gay people who hate bisexuals, but I have also dealt with bisexuals who gave me crap for being gay, inside the community ("Nobody is 100% gay! You're being close minded for not liking men! Try dick, you might like it!"). Not to mention trans people face similar issues. Nothing is going to be completely solidarity, but there are still plenty of nice people that outweigh bad ones.
When and if people in LGBT give you shit about being bisexual kindly remind them of the perception outsiders have of them for being gay/lesbians. Ask them how that feels? Does it feel good when people pass judgement on you because they are not in par with who you are? That tends to make them see their hypocrisy. It has always worked out for me.