I agree with you. It's not only the GLBT pride that bothers me, but the other cultural prides such as African Americans, Asians, Latino Americans, women, deaf, etc...
At NTID, there are some people who take "Deaf Pride" too far that it pisses off or ruin reputations. I'm hard-of-hearing and I can speak orally for myself, but it was a challenge in some of my classes since some classmates were uncomfortable working with me. It turned out that their previous deaf classmates were rude and demonstrated too much "deaf pride". Those deaf students would refuse to cooperate with these hearing students cuz they were hearing and didn't know what it's like to be deaf. They would keep whining to the interpreter that they weren't getting enough attention from the hearing students and felt that the hearing students were discriminating them. Etc, etc. This happened so much to these hearing classmates that when they came to me, they were very uncomfortable with working with me. It took me a few weeks to get them to realize that I wasn't like those other "Deaf Pride" extremists.
Back to the GLBT pride, the same applies. I have a friend who loves rainbows, but people tease her about her sexuality and assume she's a lesbian. Rainbows are something she likes and shouldn't be interfered with by others. When she asked others why they thought she was a lesbian, their response was that every time they see a rainbow-related product, it's always by a GLBT person and that GLBT are always boasting rainbow as only a GLBT thing. Because of that, she gets a bit uncomfortable being around GLBT because they're ruining her way of life.