This has happened to me a few times at both WDW & UO. When DS was young, we spent a lot of time at the parks, so most of my casual wardrobe was from what was then DTD. Some was from Universal. I never paid any attention to what I was wearing to either park. This led to a lot of good-natured ribbing from the CMs. The funniest was when DH & I went into GS at Universal Studios. I was next in line. No one was behind me. The lady says, "next". I step up, then hear, "next". She repeats this a couple more times pretending she doesn't even see me. Eventually, she says, "oh sorry, but we don't help people who wear Disney shirts." I then looked down to see I did indeed have on a Disney outfit. She eventually helped us, but not until everyone there, including us, had a good laugh at my shirts expense. If you want CM attention with good-natured ribbing, wearing the competitions merchandise is a likely way to get it. I'm not really one who wants to draw attention to myself, so I eventually got a clue & started paying attention to what I was wearing to the parks.