Assuming you have a 2nd gen gun, I wouldn't give it another thought. The earlier guns were more severe. Ample "research' around here has concluded that P3AT smiles are pretty much a non-issue. The bullets still perform well and there is no history of a resulting problem. I have heard of a few other guns that produce them as well although I can't recall what they are. As a precaution, I would not cycle the same rounds over and over as that could concievably lead to an over-pressured round from bullet setback. In other words, do not take the top (smilied) round out of a mag and put it further down in the mag where it will get "smilied" again. I probably would not hand cycle rounds over and over either. If your mag followers get beat up, call KT service for new ones. Other than that, not a big deal.
Ah, the great smilie debate. Frankly, I'm one who thinks there is little-to-no significant effect of smilies on bullet performance. They occurred primarily in 1G guns. Here is a wetpack test I did a while back that supports my views: