First, I had great instructors at Portland Community College.
Also, in addition to what I learned there, an area company (Tektronix spinoff) happened to put a job post there for a co-op student, and it turned out to be a great company, doing big things, which launched my career.
After later working and then going to fancy-pants schools, one day a professor dissed community colleges to me. I thought the professor was wrong and out of line, so I talked constructively with them about that. But I still felt bad, and didn't need the stigma in those particular circles, so I removed community college from my Web CV.
When I was finally making a LinkedIn, I found one of my instructors from community college on there, and wrote them a note, thanking them, and telling them how helpful and important their teaching had been to me.
Maybe the next day, I realized I'd left community college off my LinkedIn, and the instructor might've seen that. So I added it back on, and have kept it on.
Community college is for people who want to better themselves, and, for whatever reason (I suspect usually involving socioeconomic circumstances) they aren't (yet?) at a more expensive college or university.
When I'm hiring, I see a lot of MIT/Stanford/Ivy on resumes, but I also pay as much attention to resumes from people who went to other schools, or who took some other path through their circumstances.