As a matter of fact, I am actually impressed with LGTB allies who actually do something. I once saw a perfectly straight guy take a beating to defend a trans guy he didn't personally know. That is admirable, in every sense of the term. I mean, LGTB people fighting for their right is a good thing in and of itself, but actually putting yourself on the line for a group you're not a part of is in many ways a form of heroism.
Then again, you don't get cookies (and you don't really get to call yourself an ally) if you're just a random person who happens not to be against LGTB gaining equal rights, or doesn't personnally perform racists or sexists acts. That's called not being an asshole, and while it is a good thing, it not admirable. There is a reason the term ally is borrowed from military parlance : you get to call yourself one if you fight for another's rights (said fighting can of course take the form of publishing an article, or marching in the street, or helping along the cause in small ways ; you don't need to get beaten up for it, but you should do something.)