Personally, I think that a yarmulke should not have anything on it, including one’s name (which is common among children). I think that the yarmulke is not necessarily the place to have smiley faces, logos, etc.
But this is solely my opinion and therefore I do not say anything to anyone who actually has anything on their yarmulkes. In other words, I won’t have it on my yarmulke and you can do what you like with yours — I’m not going to tell you that you’re wrong if you do have something on your yarmulke.
The Wolf