No. But by who are you embarassed? People you know, or strangers?
Strangers don't know you, and will probably never think of you again after passing by.
While people who know you should be able to accept you for who you are.
For me it's not only that I don't mind anyone having the opinion that what I do is childish. I have way more important things to consider in life than that.
But it's also that I feel bad for anyone that thinks that way. It means they are probably limiting their own enjoyment by believing in this concept that something is "too childish". If you enjoy it, you enjoy it. What's the problem?