The reason Speedos are stigmatised

[tawniessam]

This reminds me of my days (long ago) working at the newspaper. We reporters would try our best to get brand names through the copy editors without capitalization: frisbee, dumpster, kleenex, speedo.... Any one of them in print without the capital letter would earn you a friendly letter from the trademark holder's attorney reminding you that the word is a proper noun. They knew they couldn't do anything about it. So the letters were always "friendly" reminders. Unfortunately, the copy editors rarely missed these attempts.