To Enhance or Not to Enhance that is the Question.... I want your opinions

Hello my fellow graveyard wanders,

First off  Thank you all for taking the time to read my blog.  I put a lot of time into it so I hope you guys enjoy it as much as I do.

I was recently asked a question on a topic that tends to be a bit taboo in the gravin world "Enhance or Not to Enhance?"  Taboo or not it did spark my curiosity about how others felt about the topic. So I thought I would give my wonderful readers a chance to voice their opinions on this topic.  And PLEASE keep your responses friendly and respectfully. I don't want anyone to get bent out of shape over this discussion. Also keep in mind everyone has an opinion so we will have to agree to disagree if we view it differently.  I am just interested in what everyone thinks.  Examples are always great and please provide links if you have them. If you have pics you would like so share for illustrative purposes please send them to me and I will post them for you. (Email addy is nailgal123@gmail.com)

The Topic:
Should methods be used to enhance a stone that is hard to read? For example should we use Shaving Cream or Chalk to make the stone more legible?  Also, I want to know which you think is more important, preservation of the stone or preservation of the data?

Just to illustrate what I am talking about for those who aren't sure. Here are a few before and after pics of a stone that has had shaving cream applied to it. (Pics were sent to me by a friend. So they are not mine.)