I would just put up with it. However, I would, at the same time, be wishing that the snorer had the courtesy to do something to reduce his snoring. Most snorers would know that they snore.

If I were a snorer (which I'm not, thankfully), I would stay awake as much as I can so as not to disturb others, because I actually have a serious dislike of disturbing other people's peace.

On a practical level, if possible, if I am seated next to a loud snorer, I would ask to be moved to a different seat, away from the snorer. I'd also put in my newly minted custom-fitted in-ear earphones and try to block out the noise.

If it is my husband who is snoring (which he does), I'd wake him up enough to stop him from snoring, because I know how to stop him from snoring without fully waking him up. That will result in everyone's benefit, including mine and his.

However, I think there may even be a merit in gently rousing a snorer enough for the snorer to stop snoring in any case. I don't think snoring loudly is good for the snorer himself (I stand to be corrected, but that's what I read somewhere)?