Look folks, once again we need to remember the original question that was asked. The OP did not mean that every act of piety was excessive. The poster was asking about others experience of when acts of “piety” are taken to the extreme and become excessive.
When it comes down to it, though, what’s wrong (or right) with excessive piety? Some of our saints have practiced things which today would be considered excessive - for example St. Thomas More, who my husband and I really admire (we even have his portrait in our home), used to wear hair shirts among other things. I’ve always thought that was strange and over-the-top, but at the same time I admired him for his devotion.
And also, what is considered “excessive”? For instance, genuflecting or bowing before receiving the Eucharist might be normal in one parish, but might look overly pious in another.
One little story I’ll share. At the small farming parish where I will sometimes attend when visiting our mountain home, we had Franciscans saying the masses during the summer. One weekend, there were two young Franciscans (one looked to be in his late 20s/early 30s, the other in his late 30s/early 40s). The older one said the mass, chanted all the parts in Latin, etc. and when it came time to receive communion, the other franciscan was the first to recieve. He knelt down and received. I was right behind him and was so moved by this, that I knelt and received. I can’t really express what I truly felt, but that it just felt so wonderful to do this. I felt that if it was ok for him to do this, it was a cue for us to also do it. Some did and some didn’t. (This is a parish that never got rid of using the pattens.)
The next time I was up there, a much older Franciscan said the mass. He looked to be in his 60s/70s, nice man, etc. I thought that since they were all from the same order, they probably all practiced the same way. So, when it came time for communion, I knelt again. I felt comfortable doing it since the Franciscans the last time did it. But after he said the mass was ended, he took the time to tell all of us to re-read our catechism (this was actually a parish which the prior pastor would teach a section of the catechism each Sunday after the homily. Everyone owned a catechism and brought it to mass - remember this is a church out in the middle of nowhere - no catholic schools - only place to receive any religious education) and to also be sure to know what is appropriate and not appropriate for mass, or something to that effect. I felt that he was pointing that to me since it’s a tiny church and I was the only one who knelt that time, but I was also one of the first to receive. Anyway, I realized that he was more liberal than the other friars (different generation), but at the same time understood what he meant. I don’t like to look out of place or appear overly pious either, as that was not my intention. But thought it was ok, since it was ok the last time.