Lucky you to live in a glorious area with a magnificent beach with miles and miles of sand for walks - share a thought for the owners of those names on the plaques - they can no longer see what you can see !
If you are concerned about the actual trees perhaps be proactive in getting the plaques put somewhere that does not attack your senses.
If it is a Tamoxifen side effect giving you a short fuse on things perhaps this is a sign from above not to walk that way.
Bear a thought for those gone before and for their grieving relatives.
Ignore the tinnitus - listen with closed eyes to the sound of the beach.