Thanks for your comments eddie...

I never understood why people have a problem with that.. Artists in traditional media always sign their work--thats what makes paintings worth $$$ today..

The initals were actually an test to see what would happen--I am sort of operating in carefree mode and my score really isn't to important to me anymore (because I can work on all the quilts (as long as they remain positive)..

Just curious, how bright is your screen, I can not even detect the initals on my system--perhaps I need to calibrate it somehow..

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John,
It may be true that the artists of today and of old, have always made a practice of signing or initialing their work. I like to think that after sweating for hours, even days on a canvas that an artist deserves to sign his name on his work. Did you know that even Gunsmiths had markings that were comparable to their signatures and would put their markings on their work too?
Although it's great to issue work that makes one proud enough to want to sign the work, in the case of these little tiles I couldn't see any possible reason or logic for wanting to do so. The administrators are quite gracious in allowing the members (participants) a personal page that contains the full volumn of work, on all quilts in which someone has worked and there, the member may share more than just initials or his/her signature.
If you were to think more in terms of the component nature of each tile in making the whole quilt, you might see that until and as it becomes a collaborative effort (as it is), each tile has little personal meaning when placed alone and untied to the quilt because there is little influence of any one particular tile, in say, a grid of 160 tiles.
I can appreciate your perception of "Carefree mode" and understand the lack of concern for maintaining a high score because tiling should really be something moreso entertaining and less competitive, at least this is my perception but then, my thinking is often somewhat unorthodox in respect to what tiling is all about.
As to the brightness of your monitor, this is a personal preference but if you are operating in the dark, it cannot easily be interpreted until your tile alights against work that has been done in other realms of brightness
and color balance is maintained between tiles. My monitor is set and operates in both 65k and 93k Kelvin (color temperature) and I have the choice of cool or warm in my viewing. The lower value gives the artwork a pinkinsh tonal quality the higher Kelvin setting gives the work a brighter bluish white feeling. See if you can find the manual for your monitor and there, you will get a fuller understanding of color temperature and it's effect on the screen image.
You do nice work John, certainly worthy of the initials but these quilts are full of nice work by alot of people and most of us agree that modesty is an attribute that keeps us humble which is also important to the developing quiltist. Perhaps there is no one else who will even notice your mark as it was tucked into the tile but only time will tell. Personally, I think that the fine style, in which you present work, is as much as you'll ever need to denote your tile over someone elses tile. Thanks for corresponding with me on this observation... Eddie M.